[2] It is built 1,375 feet (419 m) below ground level, inside an abandoned mine in Cwmorthin quarry in Snowdonia (Eryri) national park.

The mine where the hotel is located was abandoned and left to rot in the mid-twentieth century.

[4] To reach the accommodation, guests have to trek with a trip guide through a Victorian slate mine.

Helmet, light, harness and boots are provided to the guests before the journey.

The hotel includes four private twin-bed cabins and a romantic grotto with a double bed.