Located 6,463 feet above sea level and in the middle of the Swiss Alps, the Null Stern Hotel has no walls, roof or bathroom.
While the closest bathroom is a public toilet 10 minutes walk away, guest have a butler on hand to serve them breakfast in bed.
The open-air hotel offers panoramic views of the mountains and the stars at night.
The room that costs 250 Swiss francs (approximately £191) per night is made up of only a bed with a couple of nightstands and lamps lets guests sleep under millions of stars.
Null Stern, which translates to Zero Stars, was founded in 2008 by brothers Frank and Patrik Riklin and business partner Daniel Charbonnier.