Hongkong and Shanghai Hotels
Hong Kong has numerous buildings with a "hole" design, like this upmarket residential complex in the upmarket Southside district completed in 1986.
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Residents believe the hole is a feng shui-driven opening for "spirit dragons" which reside in the hills behind -- it's said that blocking their path into the water will bring misfortune.
Antonio Saba
This belief has persisted over the years not just for this building, but others around the city. Hongkong and Shanghai Hotels, which runs The Repulse Bay, told CNN that this was not the case.
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Completed in 2011, this luxury development features several "holes" in its design. The gaps, which have sky gardens, were built to enhance air ventilation through the cluster of buildings.
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Bel-Air on the Peak (far right), completed in 2008, comprises eight towers located by the waterfront in the Pok Fu Lam neighborhood. The holes were designed so they wouldn't block the views.
Peter Jaehnel/Picture-Alliance/dpa/AP
Built in 2005, this 231-meter tall development in West Kowloon consists of four towers, two of which join up on the 69th floor to form an arch, resulting in a "gap" beneath. The Arch's name in Chinese pays homage to the Arc de Triomphe in Paris, France.
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For the government's headquarters, the reasons behind its "hole" design is much more nuanced.
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Created by Hong Kong-based Rocco Design Architects and unveiled in 2011, the design aims to connect people and increase the area's walkability.
CNN  — 

The Repulse Bay is a luxury apartment complex in Hong Kong that is famous locally for the curious hole cut into the body of its undulating façade.

It is not alone. Along the coast of Hong Kong Island, you can find multiple properties with gaps in their midst. There’s the Larvotto residence in Ap Lei Chau, a small island off the south coast, with hollowed out “sky gardens.” Further west, in Pok Fu Lam, the Bel-Air on the Peak complex – which comprises eight tower blocks, and was designed by Foster + Partners – has a sizable peephole, offering ocean or mountains views.

Buro Ole Scheeren
The architects at Büro Ole Scheeren proposed this design for the new headquarters of Axel Springer, one of Europe's largest multimedia firms. The pixelated opening hints at the client's commitment to transparency. "At the core of the new building floats an urban-scale void, establishing a visual axis between former East and West and conceptually reuniting the two sides," the architects write in their project description. "The building emerges as a symbol of transparency and historic awareness."
KHUSHALANI ASSOCIATES ARCHITECTURE & BEYOND
Poro City, designed by architects at Khushalani Associates in 2015, is a plan to restructure the highly dense environment of Dharavi in Mumbai, one of the largest slums in the world. The proposed pyramid structure, described by the architects as an "integrated 3 dimensional city," spreads over 216 hectares and can accommodate around 376,000 people and 5000 businesses. The concept, which was proposed in the eVolo skyscraper competition in 2015, also has spaces for public amenities including schools, parks, and hospitals. The open-ended nature of its 'holes' allows for different cubicles to be "plugged-in" or added in case there's a need for more spaces.
Zaha Hadid Architects
Upon completion Zaha Hadid's Opus Office Tower will consist of two structures, conceived as a single cube eroded by a free-form void. Given the temperatures in the United Arab Emirates, you might mistake it for an ice cube whose mid-section has melted away.
Zaha Hadid Architects
According to its architects, a pixelated reflective façade will make the cube seem full during the day time. However, at night it "dematerializes" as specially installed lights flood the void.
Bjarke Ingels Group (BIG)
Danish architect Bjarke Ingels proposed this large cube for the Technology, Entertainment & Knowledge Centre (TEK) in Taipei. Its various holes are actually entry points and vantage points for pedestrians who can snake through the building on an internal staircase, which leads from ground floor to rooftop garden.
Bjarke Ingels Group (BIG)
Inside the cube pedestrians and employees will walk past offices, shops, showrooms, hotel rooms, conference rooms and exhibition spaces. "At the roof of the cube, the trajectory expands forming a big informal public arena," the architects write. "All restaurants on the penthouse floor open to the arena, making it a natural gathering point for Taipei teenagers for social hangout and informal performances."
Eric Gregory Powell
Architect Rem Koolhaas famously declared that he wanted to "kill the skyscraper." As part of his assault, he conceived the Beijing CCTV Tower, an oddly-shaped complex of six interlocking vertical and horizontal structures. The 44-storey building includes a large hole in the center, which explains why locals sometimes refer to it as "big boxer shorts". In 2013 the Council on Tall Buildings and Urban Habitat named it the Best Tall Building Worldwide.
MVRDV
Architectural firm MVRDV did not run out of money before completing The Mirador apartment complex in Madrid. The hole in the middle is actually a semi-public sky plaza which provides an ideal vantage point to enjoy the nearby Guadarrama Mountains. It also includes a community garden, thereby "monumentalizing public life and space."
The Guangzhou Circle is not meant to resemble a cable reel, a spool of thread or a wheel. According to Italian architecture firm A.M. Progetti, it actually invokes an ancient jade disc, which included a hole at its center. Employees inside the building, which is home to the world's largest stock exchange for plastic, are privy to another spectacular feature. When reflected into the nearby river, the building forms the number 8—a symbol of luck in China.
RMJM
The British architects behind the Gate of the East Building in Suzhou, China say that it is "a mix of westernized pure form and Chinese subtlety," and that it represents the significance of modern China. Locals say it looks like a giant pair of pants.

Rising 74 stories and costing more than $740 million, it has stoked criticism that China is becoming 'the playground of foreign designers with laughable architecture ideas."
OMA
OMA, the Dutch architecture firm, dreamed up this ambitious design for a Science Centre, Aquarium and Science Theater, which would have sat at the entrance to the Magdeburger harbour. The design consists of 10 large blocks that form a building shaped like a ring. It has been compared to a giant stack of Tetris blocks missing a piece in the middle. Owing to the expense of the project, the Science Centre was never built.
ChinaFotoPress/Getty Image
When Shanghai's World Financial Centre opened in 2007, the 1,614-ft. high building was the second tallest in the world. The hole near its top isn't a design flourish meant to frame the sun. Architects included it to reduce wind pressure against the building. Original plans called for the trapezoid aperture to be circular, but locals protested that would resemble the rising sun in the Japanese flag.
MIGUEL MEDINA/AFP/Getty Images
In 1982 French president François Mitterrand staged an international design competition to create a "modern Arc de Triomphe." The Danish duo of Johann Otto von Spreckelsen and Erik Reitzel won with their Grande Arche de la Défense, which is meant to celebrate humanity rather than commemorate military conquest. Visitors don't just get a view of Paris through the Arc: there is also a viewing platform on its roof.

These quirky cut-outs have long been rumored to exist for purposes of feng shui, an ancient Chinese system of summoning happiness and fortune through an individual’s surroundings. Such holes, it is said, act as gateways for “spirit dragons” that reside in the hills behind the towers – blocking the dragons’ path to the water could bring misfortune to local residents.

In reality, there are often more practical reasons than feng shui for hollowing out a square of what would have been prime real estate.

Enter the dragon?

Built by The Hongkong and Shanghai Hotels company in 1986 at a cost of $38 million, The Repulse Bay is a 88,733 square meter (955,546 square foot) ocean-facing residential complex with a gaping 16-meter-wide and 24-meter-high hole.

The unusual design was chosen for its dramatic aesthetic. “We believe it was the first of its kind in Hong Kong,” says Martyn Sawyer, group director of properties for the Hongkong and Shanghai Hotels.”

Antonio Saba
An aerial view of Repulse Bay.

“Initially, (the hole) was a shock to a lot of people, because they hadn’t seen anything quite like that even in the city – nevermind on the greener side of Hong Kong,” says Ann Tsang, a creative director who moved to Hong Kong from Scotland in 1984, and lived near the property for several years.

There was also a lament for the loss of the property the tower replaced: The Repulse Bay Hotel, which was built 1920. But as was the case with so many low-rise colonial buildings in Hong Kong, in 1982 it was demolished to make way for a more space-efficient high rise.

Although the Repulse Bay hole was not inspired by feng shui, the “spirit dragon” theory emerged locally. It helped Hongkongers to make peace with the new building, Tsang says. “It was like: ‘We’ve lost a colonial building, but look at this, it’s super contemporary – and by the way, it’s got this kind of mysterious, mythical aspect to it.’”

Hongkong and Shanghai Hotels
The site of The Repulse Bay was previously home to a luxury hotel that opened in 1920.

The story, Sawyer says, became “local lore.”

“We have heard that locals believe that a family of dragons lives in the surrounding hills, and the mother dragon takes her children down to the sea to bathe each morning in the cool blue waters,” he says. “In order not to block the family of dragons and bring bad luck to the site, the superstition is that the ‘hole’ was designed so that they could pass through.”

Wall to wall

Dragons, of course, do not live in the hills of Hong Kong. Reality is somewhat less mythical.

In the 1980s, developers began to build rows of high-rise blocks dubbed “wall-effect buildings,” which led to more holes added to Hong Kong’s architectural landscape.

Cultura Creative/Alamy
The Caribbean Coast complex in the Tung Chung district, completed in 2006, is an example of "wall-effect buildings" in Hong Kong.

“The first ‘wall-effect buildings’ came about in the mid-1980s, when property development began to increase in scale as the government prioritized it as a mainstay of economic development,” says Hoyin Lee, an associate professor in architectural conservation at the University of Hong Kong.

Lee pinpoints the City Garden private housing development in the North Point district, completed in 1986, as one of the earliest “wall-effect” properties. Such buildings were designed to squeeze as many units as possible onto a plot of land for higher profit margins.

The City Garden complex in Hong Kong.

“As more of these properties were built, people (in the surrounding buildings) started to complain they were blocking the views and ventilation,” says architect Michael Chiang, who runs Hong Kong-based Michael Chiang and Associates Architects. Developers came under pressure, he explains, to find a solution.

In 2005, the city’s Planning Department published a report, Feasibility Study for Establishment of Air Ventilation Assessment System, aka the “AVA Study.” It led to the establishment of a set of guidelines on air ventilation for government-funded property projects. “However, these guidelines are not legally enforceable for private developments,” says Lee.

The regulations did, however, have a cultural impact.

“A lot of the time, when the government allows sites to be built on, it will ask for a gap to be left in between structures,” Chiang says. “But maybe you don’t have enough space to do that. In the end, you come to a compromise and create a gap in the middle. You say: ‘I have opened up a hole, you have ventilation, there is still a view.’ That’s how you get around it.”

Out-there design

There are, course, reasons for a holey design other than feng shui or financial gain. Holes can provide entryways for light, influence how a building fits into its surrounding, or be symbolic of something altogether more meaningful.

Take the Central Government Complex in Admiralty, which has served as the city’s government headquarters since 2011. Its “hole” design has a more nuanced meaning.

“It was not designed with feng shui in mind, but with urban design intentions of connectivity and sharing,” says Rocco Yim, co-founder of Hong Kong-based Rocco Design Architects, which designed the complex.

ITPhoto/Alamy
The Central Government Complex in Admiralty, Hong Kong.

The 118-meter (387-feet) structure takes the form of a giant arch: one leg is home to the Legislative Council, the other houses the Executive Council, while the horizontal floor that links the two features government offices. A public park is located underneath.

“The government offices ‘float’ above the public space without impeding movement … creating the visual metaphor of an open door,” says Yim.

It’s a design quirk with functionality and has become a Hong Kong landmark.