Ukraine, Donetsk district, Sviatohirsk Cave Monastery.
The Sviatohirsk Lavra or the Sviatohirsk Cave Monastery (Ukrainian: Свято-Успенська Святогірська Лавра) is a historic Orthodox Christian monastery (a lavra) near the city of Sviatohirsk in Donetsk Oblast (province) of eastern Ukraine. The lavra is located on the right bank of the Seversky Donets River. The name comes from the hill on which it sits on — Sviatohirsk or Holy Hill.
More details here: en.wikipedia.org/wiki/Sviatohirsk_Lavra