In the next few years, extreme travelers could spend the night floating around in a space hotel. For now, what the earth can offer will be enough.

Thankfully, some options have the potential to satisfy even the most adventurous* — take for example the deepest underground hotel suite* in the world. Located in the old, 15th century Sala Silvermine in Sweden, the suite lies more than 155 meters under the earth’s surface.

The tunnels of Sala’s mine were used to excavate* for silver until 1908. Now, it houses a museum, a theater, two ornate* dining rooms, and a hotel suite where two people can spend the night.

Guests are first toured around the underground facilities so they know their way around, but ultimately* left alone overnight — attendants stay on ground level.

If you are hit by the call of nature in the middle of the night, you would have to go up 55 meters to access the nearest toilet. No bathroom exists within the mine. Phones, of course, do not work that deep underground.

Clearly, if you are claustrophobic*, or if you really just cannot stand gloomy* places, this hotel is not for you. But if you fancy a stay underground for whatever purpose you might have, you can spend a night in Sweden’s Sala Silvermine suite for US$580.

(SD-Agencies)