UCHISAR in Cappadochia
SEE https://en.wikipedia.org/wiki/Cappadocia
Way back in the early 1990s my wife Shona and I were able to visit Cappadochia –travelling cheap. We stayed at a guesthouse cave carved from a hiilside …. and apart from the landscape were fascianted by the underground Chrisitan cites from way back in time when the ancient Christians wnet underground literally as well as figuratively in order to survive the Expanding Muslim forces.