1. Joule Hotel, Dallas
This pool extends eight feet out and over the side of the building at the tenth-floor.
2. Adelphi hotel, Melbourne
The heated salt water has a glass bottom and cantilevers over Flinders Lane from 9 stories up
3. InterContinental Festival City Hotel in Dubai
A transparent plexiglass section extends beyond the edge of the hotel building, overlooking the Dubai Skyline.