Hydropolis, Dubai

The original plan was to locate it 20 meters (66 ft) underwater off the coast of Jumeirah Beach, although this site was later found to be unsuitable.

Joachim Hauser's and Prof. Roland Dieterle's architecture idea was to represent the connection between humans and water.

[5] The purpose of the land station would have been to provide a place for guests to board the soundless train that would descend into the hotel.

The noiseless train would have been located in a 515-meter-long (1,690 ft), transparent, double-track tunnel, made of plexiglass reinforced with concrete and steel.

The stationary motor for the train system would have been located in the land station, and would have been connected to cables running down the length of the tunnel.

The train cars, fixed to these cables, would have been moved up and down the tunnel solely from the power of the land motor.

This system was considered be advantageous because separating the motor from the train cars would decrease noise in the tunnel.

To handle the underwater pressures, the hotel's main structure was planned to be a dome composed of plexiglass, reinforced with concrete and steel.