The peninsula of Crimea is not only known for its magnificent castles, beaches and specious nature, religious monuments, but also the cave cities of which a significant amount of it. These cities are abandoned many centuries ago and today are a neglected and half ruined monuments of architecture and history of many nations. These ruins are fraught with many important historical events of those nations, which in different time periods lived in this region of Crimea. More than 10 famous cave of all cities, visit their tourists come from all over the Crimean Peninsula: Kiz-kul, Eski-Kerman, Cyuyren, Kiz-Kerman, Kerman Tepe, Chelter-cob, Calamita, Buckley, Shuldan, Chelter-Marmara Kachi-kalon, Calais, Mangup feces. Most of them are related to the Middle Ages, but among them there are built for many centuries before this era. For many years, historians talked about and put forward conjectures about the origin of these cities, then called "cave." A separate share of these cities was established to move to Crimea laymen and monks, who for some reason were forced to leave the various provinces of the Roman and Byzantine empires, and found a new home here. Another part of the cave cities, according to the assumptions of historians, was founded by the Byzantine emperors and by the decree is a piece of defensive structures, which in the second and seventh centuries AD permanently erected around the perimeter of Chersonese. Over time, this fortress gradually increased and acquired urban features. So fortress Mangup Calais became the capital of the principality of Theodoro and the fortress of Calais was placed the residence of the Crimean Khanate.