Kleindienst/Floating Seahorse
The Floating Seahorse villas take the houseboat concept to the next level. For starters, each three-story retreat features an entire floor submerged beneath the sea. Brought to life by Kleindienst real estate and property developers, the villas are part of the Heart of Europe resort opening off the coast of Dubai.
Kleindienst
On the outside hull, the architects used three main components: Glass Reinforced Plastic (GRP), steel, and acrylic. Connecting the acrylic to the hull was another challenge, as it required a highly flexible, long-lasting sealant that only about three companies in the world make -- of those, only one supplier was able to match the project's technical requirements. 
Kleindienst/Sharbeen Sarash
Stretching across three levels, Floating Seahorse villas include two underwater bedrooms, an outdoor sun deck, and a rooftop with a glass-bottom Jacuzzi. Around 50 floating abodes will be ready to welcome guests at the end of this year, with a total of 131 villas expected by the end of 2017. 
Sharbeen Sarash
At just 9.5 centimeters thick, the floor-to-ceiling underwater windows make it seems like there's nothing between you and the fish. However they're not made of glass, as that would cause distortion and could not withstand the water pressure. Instead, the team looked to aquariums and submarines and used acrylic for its durability and crystal-clear views. 
Kleindienst
Inspired by the mysteries of the deep, Kleindienst studied underwater projects for decades until he finally had the chance to bring his vision to life in 2008, as part of the "The World" project off the coast of Dubai.
Dymitr Malcew
Designed by Singapore-based architect Dymitr Malcew, The Floating House aims to make the nomad life as leisurely and luxurious as possible. Each home is fully sustainable, built with its own water purification system and solar panels for electricity.
Dymitr Malcew
When building The Floating House, one of architect Dymitr Malcew's main goals was to complement the surroundings. Taking inspiration from nature, the design accentuates the landscape, featuring floor-to-ceiling glass curtain walls and an abundance of wood. Each room has easy-access to a wrap-around terrace, and enormous windows let in lots of natural light.
Dymitr Malcew
To enable The Floating House to rise and fall with the tides, architect Dymitr Malcew constructed the home on floating steel pontoons. An engine can be installed upon request, enabling owners to travel the world from the comfort of their own home.
Architect Koen Olthuis - Waterstudio.NL/developer: ONW/BNG GO
An ambitious project from Dutch developers ONW/BNG GO, the Citadel is Europe's first floating apartment building. It's part of the New Water development project, which will comprise six floating apartment buildings -- all designed to adapt to flooding and rising water levels.
Architect Koen Olthuis - Waterstudio.NL/developer: ONW/BNG GO
The Citadel floating apartment building is home to 180 modules, which rest on top of a floating concrete foundation. A floating road connects the complex to the shore, so residents can park their cars on site. Dutch developers ONW/BNG GO designed the complex to be highly efficient, consuming 25 percent less energy than a conventional building of the same size.
Robert Harvey Oshatz, architect / Cameron Neilson, photographer
Made with a mix of western red cedar, Douglas Fir and copper, the Randall T. Fennell Residence sits gracefully on the Willamette River in Portland, Oregon. Curving rooftops mimic the ripples in the water below and create an eye-catching silhouette.
Cameron R Neilson
The residence's exposed beams add an industrial feel, while curved ceilings and rich wood warm up the vibe. A deck wraps around the home, leading visitors to the open-air patio in the front of the home where they can take in dramatic sunset views.
Robert Harvey Oshatz, architect / Cameron Neilson, photographer
Surprisingly spacious inside, the 2,153-square-foot (200sqm) houseboat includes a loft-style master bedroom and an open living space. Drawn up like a sail, a clean white wall draws focus to the piece de resistance: a floor-to-ceiling glass window that looks onto the river.
Jose Campos Photography
This floating abode is all about sustainable, mobile living -- anywhere in the world. From the designers of Friday SA, a Portuguese design and engineering firm, Floatwing was built to travel and its modular design can be broken down and transported in two or three shipping containers. You can anchor where you wish, or motor around at a speed of up to 3 knots.
Jose Campos Photography
As stylish as it is sustainable, Floatwing homes come with a wine cellar, barbecue area and a rooftop terrace. As for sustainability, the designers chose eco-friendly materials such as cork and wood. It's energy efficient too, thanks to double-glazed panels for insulations and solar panels that cover up to 80 percent of energy consumption throughout the year.
MOS Architects / photographer Florian Holzherr
Tucked away in the Great Lakes, MOS Architects' one-bedroom Floating House rests atop steel pontoons, allowing it to rise and fall with water levels. Built off site, the house traveled about 50 miles before reaching its home on the remote island in Lake Huron.
MOS Architects / photographer Florian Holzherr
Inspired by the surroundings, MOS Architects designed Floating House Lake Huron with clean lines and a natural palette. Inside, bright white walls and enormous windows open up the ground floor's 1,000-square-foot space (92 square meters), while cedar rain screens on the facade offer both form and function.
Designs Northwest Architects / photographer Ben Benschneider
A project by Designs Northwest Architects, Lake Union Float Home is part of Seattle's unique houseboat community. Inspired by the century-old marina warehouses on the docks, the architects created a modern home with historical touches, evident in the industrial form, steel beams, polished concrete and caged spiral staircase.
Jet Capsule
Don't worry: these are not a figment of your imagination. Made of two fiberglass shells, the UFO (which in this case, stands for unidentified floating object) is essentially what it looks like -- a spherical boat, able to reach a top speed of 3-5 knots.
Jet Capsule
The shells are made of fiberglass and secured with a hermetic seal, which keep it afloat and stable. The Italian company behind the concept, Jet Capsule, says the sphere is unsinkable, utilizing a special elastic anchor system to maintain stability in rough seas.
Jet Capsule
The UFO is completely self-sustaining, incorporating innovative features like a water generator that turns salt water and rain into potable water. The mobile home also has solar panels and optional water turbines to power the battery. 
ewout huibers
Stretching across 2,152 square feet, Watervilla Weesperzijde sits on Amsterdam's Amstel River. Designed by +31ARCHITECTS, it's all about the river views: luxurious floating abode boasts a glass façade and a terrace that runs the entire length of the villa. Tech-savvy touches, such as automatic sun shades and strategically placed LED lights add a modern touch.
+31ARCHITECTS
House boats are nothing new in the Netherlands, where much of the land lies beneath sea level and is susceptible to flooding. Designed and constructed by +31ARCHITECTS, the 2,120-square-foot Watervilla de Omval floats on the Amstel River. It's a contemporary take on the traditional houseboat, featuring a curvaceous exterior, glass-front façade and a rooftop terrace to make the most of the surrounds.
BYTR/Stijnstijl photographer
You won't find any portholes aboard The ParkArk Oog-in-Al, but the contemporary houseboat still floods with natural light from enormous windows and skylights. Another custom project from BYTR architects, the copper-clad boat is moored on a leafy green canal in Utrecht right next to a footbridge. Due to its public location, the designers strategically planned the home's doors and windows to enable park and river views while maintaining a sense of privacy.
BYTR/Liesbeth Sluiter photographer
Designed and built by BYTR architects, Muntboot sits on a quiet canal in Utrecht, a city in the Netherlands that's known for its medieval waterways. The split-level houseboat could easily double as a piece of artwork, thanks to wooden slants of various widths that give the façade texture and depth.

Story highlights

The Floating Seahorse villas are part of a new resort in Dubai

131 of these innovative structures will be completed by the end of 2017

The homes feature an entire floor submerged underwater

See the gallery above for other designs of floating homes from around the world

CNN  — 

From the Burj Khalifa to the Infinity Tower, Dubai is famous for its astonishing architecture. But the city’s most innovative structures yet aren’t reaching for the sky – they’re diving into the ocean.

Originally introduced at the Dubai International Boat Show in 2015, the Floating Seahorse villas are unlike anything you’ve seen.

For starters, the villas float like anchored boats – albeit without listing from side to side.

And each three-story retreat features an entire floor submerged beneath the sea, with two enormous windows – each measuring 269 square-feet (25 square-meters) – that provide front-row seats to marine life.

“This is an original idea, to have a boat villa with a submerged floor where you can experience the feeling of stepping down into the master bedroom, be in contact directly with the walls, and see the reef, the marine life all around you – you’re surrounded by it,” says the project’s architect, Gianfranco Rasile.

A lifelong project

Designed and constructed by real estate and property development company Kleindienst, the villas are part of the Heart of Europe resort, which comprises six man-made islands, more than a dozen hotels, and the world’s first climate-controlled streets.

Around 50 floating abodes will be ready at the end of this year, with a total of 131 villas expected by the end of 2017.

The chairman of Kleindienst, Josef Kleindienst, says he has been dreaming of these underwater retreats for more than 30 years. Surprisingly, the imaginative entrepreneur is not a diver or a sailor – he’s actually afraid of the ocean.

“I never go diving, or swimming even, but I have always been interested to see what’s under the sea – and why [people] go around the world to dive,” he says.

Inspired by the mysteries of the deep, Kleindienst studied underwater projects for decades until he finally had the chance to bring his vision to life in 2008 as part of the “The World” – an ambitious mega-development off the coast of Dubai that features 300 reclaimed islands that mimic a map of the globe.

“We started designing the villas in 2008 but the design changed several times. We could not find the ‘wow’ effect, so we started a competition. We invited architects from 10 different countries to submit ideas, and Gianfranco’s theme was the one that really made us all say ‘wow’,” says Kleindienst.

It all hangs in the balance

You might expect the Floating Seahorse villas to bob up and down like a boat and cause sea sickness in a storm. But on board, it’s unexpectedly still.

The project architect, Gianfranco Rasile says the architectural team grappled for months to achieve this neutral buoyancy. The work required careful calculations and dozens of trial runs in a simulated environment in Dubai Maritime City.

“People think it’s sitting on the seabed,” says Kleindienst. “But it’s [anchored] at least 1.5 meters off the bed, and it’s always going up and down every day with the tide movement.”

As for the underwater windows – at just 9.5 centimeters thick, it looks as if there’s nothing between you and the fish.

Sharbeen Sarash
The underwater windows

However they’re not made of glass, as that could not withstand the water pressure. Searching for a solution, the team looked to aquariums and submarines and used acrylic instead. As a result, the construction has crystal-clear views and the durability to withstand years in salt water.

“The Arabian Sea is very salty so we’re really restricted in the material we can use,” says Rasile. “Inside, if you look at the material we’re using — it’s teak and marble. You have to use materials that can resist the temperature and the salt in the atmosphere.”

Under the surface

If you’re familiar with the Arabian Gulf, you might be surprised to hear it is associated with abundant marine life. But Kleindienst planned ahead, creating his own underwater world.

“For several years we have been going to areas where construction is affecting coral reefs, and relocating them to the Gulf in order to save them,” says Kleindienst. “We will have more than 100,000 corals across 2 million square feet of seabed.”

With the coral came coral fish, and with the fish came predators. The Gulf is now teeming with marine life – including the villas’ namesake creature – although the endangered species needed some help from marine biologists to breed.

“It’s like a surprise in the ocean,” says Kleindienst. “Sometimes it’s turtles, many times barracudas hunting the smaller coral fish, groupers, and at least 30 different species that you can watch from the underwater rooms.”

Scroll through the gallery above to see images of other floating homes from around the world.