The world's first underwater hotel is now open for business.

The two-story villa in Maldives is 15-feet below the Indian Ocean.

There is a bar, infinity pool, private gym, and even a bathtub that faces the ocean.

The top floor above the water has a “relaxation deck,” where you can tan in the sun.

Four nights costs $200,000, including a personal chef and the use of a private boat.