People have lived in caves world wide through out history in places like France, Italy, Morocco, Turkey, Spain and more. Some are huge and have ten or more rooms and remain at perfect temperature in cold or heat. Granada Province in Spain, has the largest population of cave dwellers in Europe.
Near the Costa del Sol, at the UNESCO World Heritage site, Alhambra, it includes the ancient cave settlements of Albaycin and Sacromonte which have existed before the 15th century. In this gypsy quarter you can find not only cave houses ( casas cueva) but also cave hotels,cave bars, cave theaters, cave spas, cave restaurants, cave flamenco etc.