Hydropolis is planning to be the first multi-room underwater hotel in the world, designed by Prof. Roland Dieterle. Thus Dubai wanted to create another attraction for tourism.
Hydropolis will lie at a depth of 20 meters below sea level and have 220 rooms (total area of underwater plant approximately 75,000 sqm) . A Plexiglas tunnel should connect the hotel with the associated land station (30,000 m² ) . The construction costs were estimated at about 520 million euros .