The deepest hotel in the world is the Deep Sleep Hotel, located in Snowdonia, Wales, UK. Built within an abandoned Victorian slate mine, the Deep Sleep Hotel boasts a depth of 419 meters (1,375 feet) below the surface.

Reaching the hotel is an adventure in itself. Guests take a 45-minute hike through the mountain to reach the main entrance. There, they are outfitted with headlamps, helmets, and harnesses, and then descend into the depths via a series of ziplines.

The Deep Sleep Hotel is basic but comfortable. It includes a four-twin bed cabin and a single suite with a double bed. Despite the cool underground temperatures, the beds are equipped with warm duvets for a cozy night’s sleep. As Dr. Emma Williams, an expert in extreme hospitality, notes, “The Deep Sleep Hotel offers a unique and immersive experience that challenges conventional notions of luxury.”

While the hotel lacks traditional amenities like room service and a spa, it offers a one-of-a-kind experience. Guests can enjoy a complimentary meal prepared in an expedition style before the night’s sleep. In the morning, they are woken up with a cup of coffee and ascend back to the surface having had the unique experience of the deepest hotel in the world.