Humans have conquered building some of the most incredible structures on land. But now it's time to conquer a whole new world, the ocean. And we're off to a great start. Whether it's a floating lily pad still in the works, or they have already been built, Here are some of the most amazing structures at sea that don't seem man-made:

1. Floating Lily Pads

The floating ecopolis or popularly called lily pads are being designed with the fact that eventually global warming is going cause the waters to go high enough where people will be seeking refuge after losing their dry land homes. These lily pads are a product of careful design and planning, and it is believed that their construction will soon be inevitable. Designed by Vincent Callebaut, the lily pads are eco-friendly and will be built in a tropical paradise.

Floating Lily Pads

2. USS Arizona Memorial

The attack on Pearl Harbour on 7th December 1941 was truly devastating. One of the biggest losses for the United States was the sinking of the USS Arizona where 1102 of the 1177 sailors abroad met their ultimate end. In 1962, sitting on the top of the fallen Arizona, a memorial was built where millions of visitors visit each year. Incredibly enough, the structure straddles the sunken ship but never touches it.

USS Arizona Memorial

3. Blur Building

Located Yverdon-Les-Bains, Switzerland, the blur building served as a temporary home built for 2002 Swiss Expo sitting over the lake Neuchatel. The structure is built using cylinders and rods to keep everything afloat. The rods were fitted with fog nozzles which release a futuristic like fog underneath the structure, which also has a complex weather system.

Blur Building


4. Underwater sea resorts

The idea behind projects like Hydropolis and Poseidon Mystery Island is living underwater. Hydropolis is a $500 million-plus, and a 220-room hotel that's currently in development near Dubai in the Persian Gulf. Once complete, it will be the world's first underwater hotel. And if all goes planned, it would sit 60 feet below sea level and cost $1,500 a night. Hydropolis will feature a shopping mall, three bars, and a missile defense system to guard against terrorists.

Poseidon, which is also under development, is a $200 million resort that's slated to be built near Fiji. Though much smaller than Hydropolis, it will feature a spectacular view of the world's liveliest coral reefs.


1Underwater sea resorts

5. Repurposed oil rigs

Oil rigs are typically forgotten after their work is done. There are a reported 27,000 abandoned oil and gas rigs in the Gulf of Mexico alone. But if visionaries like Ku Yee Kee and Hor Sue-Wern have their way, they could be among the coolest places to hang out when venturing into the deep ocean.

Their plan calls for the reconstruction of oil rigs into self-sufficient structures equipped with apartment complexes and marine research stations. Alternately, you could stay at an oil rig repurposed as a hotel — either a luxurious oil-rig-aqua-resort or a diving station from where you can embark on your undersea adventures.

Repurposed oil rigs

6. Ithaa Undersea Restaurant, Maldives

Seafood takes on new meaning at Rangali Island's underwater restaurant, a 14-seat eatery located 16 feet below the water's surface. The boat-size structure is encased in a transparent acrylic tunnel offering 270-degree exterior views, so it's almost like dining in a fish tank. Visitors descend into the restaurant through a spiral staircase that's located in a thatched pavilion at the end of a jetty. 

. Ithaa Undersea Restaurant, Maldives

Ithaa was built in Singapore and then transported to the Maldives, where workers situated the 175-ton structure on the sea floor by filling it with 85 tons of sand ballast. They then attached the restaurant to four steel piles (each of which had been vibro-hammered approximately 15 feet into the seabed) with concrete.

7. Cancun Underwater Museum (MUSA), Mexico

The Cancun Underwater Museum features more than 400 life-size sculptures sitting on the sea floor in 28 feet of water. It's a museum without walls, and each work of art is made from pH neutral clay that encourages the growth of corals and attracts sea life so the sculptures will grow and change over time.

. Cancun Underwater Museum (MUSA), Mexico

Artist Jason de Caires Taylor added 63 new pieces to the museum, including a kinetic sculpture boasting wings made of living fan coral and The Listener, which features an underwater device that projects nearby sounds. MUSA is accessible to divers and snorkelers.

8.  Maunsell Sea Forts

The Maunsell sea forts were an incredible innovation of their time. The forts were built during World War 2 over Thames and Mersey estuaries as a way to defend the United Kingdom from attacks. Designed by Gary Maunsell, they were used by both the army and the navy and were decommissioned in the 1950s. Then they were used for Pirate radio broadcasting.

Maunsell Sea Forts

9. Floating House

House-boats are nothing new in the aquatic world but this house designed by Dymitr Malcew is truly a sight to behold as it is a real house sitting on top of a buoyant platform, thus giving it the ability to float. The house can be tethered to a dock just like a regular boat. It also has a living room, two bedrooms, two bathrooms, and a full kitchen.

Floating House


10. Aerohotel

The Aerohotel, designed by Alexander Asadov, is still in the planning stages. It is an eco-friendly Hotel that sits over the water with conservation in mind. The structure floats and the support system is designed so that the gravel doesn't interrupt normalcy for the ocean below the surface.

There are plans for the Aerohotel to have cafes, restaurants, and winter gardens. however, with the way the design is, a tidal wave or rough waters could make the hotel feel like it's dealing with an earthquake.