Calvin Chua
One of the most recent residential developments in Pyongyang, Mirae Scientists street was completed in late 2015. The street features a collection of buildings with different exterior forms, facades and colors.
Calvin Chua
A recently completed e-library for scientific works, the Sci Tech Complex was designed to mimic the shape of an orbiting atom.
Calvin Chua
A new residential street with 70-story towers under construction on Ryomyong Street. The speed of construction has been extremely rapid, with one story being completed every two to three days.
Calvin Chua
A group of international and local North Korean architecture students analyzing a project site during the AA Visiting School workshop in August 2016.
Calvin Chua
A student works inside the Pyongyang University of Architecture and Building Materials.
Calvin Chua
Dubbed the 'mini-Dubai of Pyongyang' by foreigners living in the city, the Changjon Street apartment complex was completed in 2012.
Calvin Chua
Potted plants and occasional solar panels on balconies offer a small glimpse into how people live in North Korea.
Calvin Chua
Many buildings in Pyongyang have been painted pasted colors to reduce the blandness of raw concrete.
Calvin Chua
Inside the Paektusan Architectural Institute, where architects and engineers work collaboratively on construction projects in Pyongyang.
Calvin Chua
Even the views in Pyongyang have been carefully choreographed. From the entrance of the Grand People's Study House, one can see the Pyongyang TV tower and the Mansu Hill Grand Monument, flanked by the Mansudae Art Theatre, Mansudae Assembly Hall Museum of the Korean Revolution and the Pyongyang Students and Children's Palace.
Calvin Chua
The main square in Pyongyang, Kim II Sung Square plays host to mass dances, performances and military parades.
Calvin Chua
Built in 1982, the monumental Grand People's Study House stretches across 1 million square feet (100,000sqm). The enormous public library is full of intricate architectural details.
Calvin Chua
The Reptile Enclosure in Pyongyang Central Zoo literally takes the shape of a tortoise. The double-curved 'head' was constructed by cladding the shingles over a steel frame.
Calvin Chua
The hexagonal ticketing hall at Hwanggumbol Metro Station is an interesting characteristic, shared by several metro stations in Pyongyang.
Calvin Chua
An example of a typical slab-like concrete apartment complex in North Korea, these four apartment towers have been built side by side with a razor thin gap between them.

Story highlights

Amidst building boom, North Korea's young architects express fresh ideas.

North Korea's annual infrastructure spending has grown roughly 10% since 2014.

Architect Calvin Chua mentors North Korean students and architects, as part of AA Visiting School program.

CNN  — 

Mega monuments, symmetrical Soviet-style high rises and grand boulevards. That’s what normally comes to mind when picturing North Korean architecture. But the streets of Pyongyang are evolving.

Curved lines, asymmetric designs and pops of color are enriching new areas such as Mirae Scientists Street – a new residential area next to next to Pyongyang Station – showcasing an eclectic mix of building styles that would have been inconceivable a decade ago.

And with North Korea’s annual infrastructure spending growing nearly 10% since 2014, there’s plenty of opportunity for architects to flex their design muscles.

Amid the building boom, foreign architects including Singapore-based Calvin Chua have seized the rare opportunity to help shape the next generation of North Korean architects.

raphael olivier
This Raphael Olivier photograph shows an example of a minimal structure built by the Russians after the Korean war. Scroll down for a gallery of Olivier's work.

Chua, the founder of Spatial Anatomy design firm, runs Architectural Association School of Architecture (AA) Visiting School program, which with the non-profit Choson Exchange program provides training to North Koreans.

International architecture students visit North Korea for 10 days to work with local students and architects on different design approaches in urban development.

CNN spoke with the Singapore University of Technology and Design adjunct assistant professor about working with North Korean architects and students, and how they’re transforming the cityscape.

When did you first visit North Korea?

I went there in 2008 as a tourist. The first impression I had was the city’s monumentality – the strategically distributed public squares, monuments, and strong vistas along the boulevards in Pyongyang. From that perspective, the city was orderly and well-choreographed.

What defines North Korean architecture?

Most of the buildings are made of concrete, because that’s the material that’s readily available. To import steel from China would be too expensive. And because of all the sanctions, it’s even more difficult. The entire city was flattened after the Korean War (1950-1953), so to some extent, a lot of the architectural styles and influences really came from the initial assistance provided by other communist states like East Germany and the Soviet Union.

Elaine Li
Elaine Li photographed rarely seen moments in North Korea during her travels. One highlight from her journey was the Pyongyang Metro.
Decorations were often elaborate, including chandeliers on the ceilings, marble pillars and paintings of Kim Jong Il.
Elaine Li
It's one of the deepest, and most mysterious, underground subways systems in the world.
Elaine Li
"It looked like something straight out of the Hunger Games," Li said.
Elaine Li
According to Li, the trains are quite efficient, running every few minutes.
Elaine Li
This photograph is a highlight from Li's time at the Metro. The doors slammed shut just as she was taking this photograph of the conductor...
Elaine Li
...but the conductor was able to stop the train in time for Li to make it on.
Elaine Li
The doors on the trains are opened and closed manually.
Elaine Li
Although tour guides accompanied the visitors throughout the commute, Li said she was able to roam quite freely through the stations.
Elaine Li
The station platforms had newspapers on display for commuters to read.
Elaine Li
"However, as the platform itself was quite dim, this man brought his portable torch to read the newspaper," Li said.
Elaine Li
Li drew comparisons between the advertisements on display in the subway in Hong Kong and the propaganda on display in North Korea. "In many ways these two set ups are very similar, because both systems showcase images by small group of people telling you to think in a certain way," she said.
Elaine Li
"The first thing I noticed was how quiet it was. It seemed so tame -- no one was saying anything -- and perhaps could even be described as a little lifeless."
Elaine Li
"In Pyongyang I did see some people on their smartphones, but far fewer so [than in Hong Kong.]"
Elaine Li
Bikes, buses, and trams were the other primary forms of transportation, Li observed. This image shows the interior of a tram.
Elaine Li
"Bikes are quite popular in Pyongyang, which makes sense since the city is quite flat and roads are long and wide."
Elaine Li
Buses are also widely used.
Elaine Li
"I just wanted to document what was in front of me, and share what I experienced as honestly as possible."
Elaine Li
"We are not allowed to take photos of soldiers, but...
Elaine Li
...I guess these soldiers had so much fun on the ride, because they didn't mind."
Elaine Li
This image of school kids fooling around with Snapchat lenses on Li's phone is one of her favorites. "It offers a positive memory," she said.
Elaine Li
Li has received mixed responses for her North Korean travel pictures.
Elaine Li
"Some people say these images are eye opening, and show a side to the country that they don't usually get to see ...
Elaine Li
...others ask why I would ever go to North Korea in the first place."

How is working in North Korea different from visiting as a tourist?

As a tourist, you’ll be so bombarded by the monuments and boulevards that it’s hard to appreciate what’s unique about North Korean architecture. After going to North Korea many times, you start to discover the small details of the city rather than the giant monuments.

The way each house has a small balcony and everyone has potted plants – that interests me much more because it reflects how people live in the city. Or the presence of mini department stores – basically, shops where you can buy anything, from shoes to clothes to solar panels within 1,000 square feet (100 sqm).

That’s uniquely Pyongyang. You don’t find that in other cities.

What surprised your students about working in North Korea?

It’s a general perception that North Koreans are not very vocal. I think that when you talk about something that is more politically neutral, like urban planning or architecture, they can be critical and analytical.

A lot of people never expect the North Korean participants to be so forthcoming with their ideas – that’s been a pleasant surprise.

What types of projects do the students work on?

Instead of designing the types of architecture that are already prevalent in Pyongyang, we focus on developing urban strategies for challenging sites in the city.

For example, we look at how to adaptively reuse and change old or empty buildings – that is conceptually new for the North Korean architects. Typically in North Korea, you would simply refurbish or demolish an existing building rather than changing its function.

Despite the building boom, a number of buildings are empty in the city. It is important to consider how to adaptively reuse these existing buildings, rather than tearing them down.

What’s it like to work with North Korean architects?

North Korean architects are very skilled with their design software. They are able to produce drawings and models, or even renderings, at a very fast speed. There is, however, a difference in how we approach design. In North Korea, architecture is a very formulaic practice, whereas the foreign students tend to spend more time thinking about the context, and the theoretical implications of design strategies.

How has architecture in North Korea changed over time?

If you look at the timeline of development in Pyongyang you can broadly break it down into a few phases. The 1950s was a neoclassical period where East German and Soviet architects were invited to participate in design projects in Pyongyang. Then we have the modernist era in the 60s and 70s, which was followed by the revival of vernacular Korean architectural elements, like Korean hipped roofs, built with concrete in the 80s.

raphael olivier
More: Photographer Raphael Olivier recently went on an architecture tour of Pyongyang. Scroll through the gallery to see and read his thoughts about each building he photographed.

"A gigantic hall featuring several screening rooms able to fit up to 3,000 seats in its largest. It is a pure example of Pyongyang's brutalist architecture. All in bare, raw concrete with modern shapes and sharp edges, brutalist buildings like this one can be found all around the city but this one is probably the most impressive of them all, and could make for a perfect science fiction film set."
raphael olivier
"This hotel is probably the most emblematic building of Pyongyang and is still undergoing construction. Towering over the city at 330 meters (1082 feet) high, its infrastructure is made entirely of concrete which gives this solid futurist look -- like a very heavy spaceship that will never take off."
raphael olivier
"One of the deepest metro systems in the world, it is accessed by very long and steep escalators. It is also used as a bomb shelter due to its depth."
raphael olivier
"Completed in 1995, this monument is quite a recent structure yet very much follows the architectural line of Pyongyang. It's made from raw granite stone and radiates harshness, struggle and strength."
raphael olivier
"One of multiple pools as well as saunas, spas, massage rooms and barber shops in the complex. Completed in 1981, it showcases pure modernist architectural features and very carefully arranged interiors, notably the tile work."
raphael olivier
"Atrium view of the Changgwang-won health complex. The building's circular form made of raw concrete reflect a socialist modernist style. The tips of the Ice Rink and Ryugyong Hotel can be seen in the background."
raphael olivier
"This sits on the outskirts of Pyongyang. The two women symbolize the two Koreas and the desire of reunification. Like many other monuments in the country, it is made from solid granite stone."
raphael olivier
"This is a street in Pyongyang dedicated to sports with numerous specialized stadiums including volleyball, taekwondo, swimming, badminton, football or pictured here, wrestling."
raphael olivier
"A remote piece of modernist architecture used only as a quick stop for tourists on the way to visit the DMZ. It stays quiet most of the time with very little traffic passing through but has a warm presence of its own and sits with dignity in the empty landscape."
raphael olivier
"Completed in 1982, the ice rink has a very retro feel while still retaining a futuristic edge."
raphael olivier
"Enthusiasts of various levels practice their skating skills, under the vast conical roof and surrounded by warm harmonious colors."
raphael olivier
"A multi-function space for the youth to practice music, dancing, theater and other activities. Yet another good example of brutalist architecture."
raphael olivier
The cinema complex is mostly out of service and only used for special occasions such as the Pyongyang International Film Festival, held every two years.
raphael olivier
"Dressing room of a private sauna at the Changgwang-won health complex, featuring beautiful green tile work with black floor, matching the unique vintage tones of the city."
raphael olivier
"The shop follows the curve of the building, and is full of vintage design elements such as the pattern-printed flooring and wallpaper on the chairs and even the staff uniforms."
raphael olivier
"The gray, minimal, and textured facade with grid-like windows was built by the Russians while helping North Korea to rebuild its capital after the Korean War. It seemingly has seen many winters, just like the people of this nation."
raphael olivier
"Pyongyang's most iconic hotel, is an extravagant 45-story high twin-tower building topped by two revolving restaurants, although only one is open. This is the view from one onto the other just after sunset, sitting 140 meters (460 feet) above the city."
raphael olivier
"This venue is a rare opportunity for tourists to mix with locals in a friendly and relaxed atmosphere. The decor is superb as any bowling arena should be, with a subtle gradient orange backdrop and remarkable flowery carpet."
raphael olivier
"A view of the capital's east seen from Juche Tower. Here the homogenous design of the city and absence of visual pollution from commercial advertising become apparent -- as well as the very linear and raw structures of most buildings."
raphael olivier
"A classical Pyongyang tower made with modernist round shapes, painted pistachio green with hints of salmon pink. It's perfectly in line with the pastel tones favored throughout the city."
raphael olivier
"The North Korean Revolutionary Opera is performed at the Pyongyang Grand Theatre, which exhibits a unique mix of socialist modernist architecture with Korean influences."

To see more of Olivier's work, visit his website.

And more recently? What trends are you seeing?

The architecture is evolving. The practice is driven by the amount of construction that’s taking place in the city. Increasingly, they are moving away from standardized designs. North Korean architects are inventing more individual qualities in their buildings.

So in the past, if you looked at older neighborhood, or even streets, like Kwangbok Street and Tongil Street – all the buildings were designed, composed and replicated in a particular way that shared a similar geometrical language.

And in the new developments?

If you look at newer streets, like Mirae Street and Ryomyong Street, within a short span of just half a mile (1 kilometer), you get a diverse collection of buildings with different forms and façades.. For example, you get to see 30-story towers being erected in the middle of a low-rise urban block, which would have been unthinkable in the past. It seems to suggest that the planners, the architects, are slowly deviating away from a more cohesive, coherent urban design.

What are some major concerns among North Korean architects?

It ranges from technical issues such as improving insulation and waterproofing for buildings to developing a sustainable development framework for the city. We have led discussions and workshops on a series of issues, for example how to develop a sustainability guideline for the city.

Is it hard for foreign architects to work in North Korea?

It’s slightly more difficult for architects to get involved in projects in North Korea – firstly, the local architects are very capable themselves. Also, the lack of communication lines make it really difficult. You can’t hold a Skype call, for example. You can email, but the best way to communicate is to be there in person.