Hotel Sant'Angelo - in the southern Italian town of Matera - features sixteen “historic dwellings” set amid a Unesco World Heritage site: doubles from £140 a night, including breakfast.
The Laleh Kandovan International Rocky Hotel, Iran
Located on the edge of the mountain village of Kandovan, 27 miles south of the city of Tabriz, the Laleh Kandovan has 10 rooms, with another 30 planned, and a large restaurant.
All the rooms have underfloor heating and some have whirlpool baths. There are Persian rugs on the floor and the walls have recessed lighting. The decor is stylishly minimalist, using plenty of tiles and letting the rough rock sides do the talking.
Kokopelli's Cave, USA
Located north of Farmington, New Mexico, close to the Mesa Verde National Park, guests at Kokopelli's Cave can enjoy views over four American states.
Rooms feature bold, bright designs with large beds, louvered windows, handcrafted furnishings and original artwork.
The hotel is a combination of seven houses, converted into 25 rooms - each varying in size and shape.
Also found in Cappadocia, Elkep Evi offers cave rooms with modern facilities on a hill overlooking the town of Urgup.