2.Jules’ Undersea Lodge, United States 

 

Originally a research laboratory, the world’s only underwater hotel sits at the bottom of the Emerald Lagoon in Florida, and can only be reached by scuba diving down six meters.

 

The lodge can accommodate two couples and is kitted out with showers, a microwave and a fridge.

 

The real attraction are the fish; the lodge is like a goldfish bowl in reverse, where you sit and watch angelfish, parrotfish, barracuda and snappers peering in at you through the window.

 

Rates: From US$400 per night