Floating Cruise Ship Terminal     This 5-million-square-foot (490,000-square-meter) floating cruise-ship terminal could host three large vessels while providing passengers a novel offshore experience, complete with open-ocean hotel stays, shopping, and dining, according to designers.

An inner "harbor" would allow smaller vessels to dock and would provide natural light for the interior of the terminal. Ten percent of the roof would be covered in photovoltaic cells that harvest solar power, according to Dutch architect Koen Olthuis of Waterstudio.NL.

The terminal is just a vision now, but Olthuis's firm, which is committed to buildings that both adapt to and combat the challenges presented by climate change and sea level rise, has made other floating fantasies come to life.

Waterstudio.NL, based in the Netherlands, has worked on a floating city near The Hague and has started projects in the Maldives, China, and the United Arab Emirates.