Burj Al Arab "Tower of Arabs" The only 7-star hotel 

The Burj Al Arab is a luxury hotel in Dubai designed by Architect Tom Wright of WS Atkins. At 321 meters
it is the tallest building used exclusively as a hotel.
The Burj Al Arab stands on an artifical island 280 meters
out from the beach and is connected to the mainland by
a private curving bridge. It is an iconic structure designed
to symbolise Dubai's urban transformation and to
mimic the sail of a boat.