Chufut-Kale is a medieval city-fortress in the Crimean Mountains that now lies in ruins. It is a national monument of Crimean Karaites culture just 3 km east of Bakhchisaray.
Its name is Crimean Tatar and Turkish for "Jewish Fortress", while Crimean Karaites refer to it simply as "Fortress", considering the place as historical center for the Crimean Karaite community. In the Middle Ages the fortress was known as Qırq Yer and as Karaites to which sect the greater part of its inhabitants belong, Sela' ha-Yehudim.
Wikipedia https://en.wikipedia.org/wiki/Chufut-Kale
Coordinates 44°44'36.322" N 33°55'6.058" E