The most beautiful hotel in the world,Ranking 5The Hydropolis Underwater Hotel and Resort

The Hydropolis Underwater Hotel and Resort was a proposed hotel, designed by Prof. Roland Dieterle which would be the world's first underwater luxury resort. It was planned to be situated 66-foot (20 m) below the surface of the Persian Gulf, just off Jumeira Beach in Dubai and cost $300 million to construct. The underwater hotel will be one of the most expensive hotels in the earth once construction is finished.

The hotel was due to open in 2006 but as of August 2010 there has been no construction, or construction planned, of the Hydropolis hotel.