Interior view of the Hagia Sophia, showing Islamic elements on the top ofthe main dome, Turkey. The Hagia Sophia originally built as a Christian church by Roman Emperor Justinian I in Constantinople (aka Istanbul).
Welcome to Derinkuyu, an underground city that once housed up to people. In the Cappadocia region, famous for its cave dwellings and underground villages, Derinkuyu stands out for sheer size and complexity. Locals began digging in the BCE.
*TURKEY ~ Kayaköy (Kayakoy) or Karmylassos, an abandoned Greek Village from Fethiye in Turkey whose inhabitants left as part of a population exchange agreement between the Turkish and Greek governments in 1923 after the Greco Turkish War.