Proposed as a Floating Ecopolis for Climate Refugees, the Lilypad can house about 50,000 inhabitants. The stunning retreat seeks a place for itself in the year 2100 when half the worlds existing shorelines have disappeared due to raising sea level.

Waterpod floating house is a triple-domed island that will fulfill all its energy requirements from natural sources. Finished with recycled wood, metal, plastic, fabric and other materials, the Waterpod will support alternative energy and vertical agriculture irrigated by the purified water from the Hudson River.

Anywhere but Dubai, the idea of building a luxury hotel 66 feet underwater would sound far-fetched. But next to the Burj-al-arab, the rotating skyscraper, manufactured islands and indoor ski slopes of the desert commerce capital, the Hydropolis will fit right in. At a rough cost of UK£300 million, this jaw-dropping engineering challenge will allow guests to get a true taste for the peace and beauty of underwater life.

AZ Island is a concept of an artificial island thats capable of movement out at sea. AZ Island is the brainchild of Jean-Philippe Zoppini, who is working in conjunction with the company Alstom Marine to realize his dream. The man-made floating wonder is huge in proportions. If conceived, it will measure 400m X 300m; capable enough to house 10,000 passengers simultaneously on its surface.

A team of Dutch designers recently revealed a plan to build a floating city on Shanghais Huangpu River. If built, the city will debut during World Expo Shanghai 2010. The floating city will have many green elements it will use the water of the river for cooling and it the city will make use of renewable energy.

Wolf Hibertz wants to use the oceans as a future site for homes. The visionary designer has found a way to use sunlight to turn minerals in seawater into limestone. The limestone would be used to construct floating island homes. Autopia Ampere would begin as a series of wire-mesh armatures anchored on top a sea mountain. After it is place, they will be connected to a low-voltage direct current supplied by solar panels.

Dubbed the SolarHome, the 75m2 homes wont be as spacious as the home you are currently living in, but will keep you floating on solar-power for a period of six to 12 months, before youll have to come back to shore for supplies. The design feature off-the-grid solar living while floating on water all through the year. The home can be operated in two modes Docked Mode, which requires you to connect to the infrastructure for power and supplies and a Self-Sufficient Mode, which enables you to run off-the-grid for a year.