Sala Travel Guide
Beginning in the Middle Ages and for centuries afterward, the Sala Silvermine produced copious amounts of silver for Sweden and its monarchs. Those monarchs, in turn, paid miners to dig ever deeper, until today the mine is a cavern of shafts and alcoves and pristine underground lakes. So naturally it was only a matter of time before someone tried to convert the entire thing into an underground hotel.
The Sala Silvermine Company that maintains the mine has two types of accommodations, which they manage in addition to their regular tours and events. The standard option is the above-ground Gruvfruns Bed and Breakfast, a hostel with 15 single and double rooms and shared bathrooms. Prices are 400 SEK per adult for a double and 500 SEK for a single, or about $55 and $70 respectively.
The real treat, though, is the Mining Suite: a double bed tucked into a small alcove, buried 155m under ground. Don't bother bringing a cell phone.