Lazareva pećina

The Lazareva Pećina, which translates Lazar's Cave, is the longest explored cave in Serbia. Located in Bor municipality, near Zlot, the cave is also sometimes referred to as Zlotska Cave. According to 2012's Recent Landform Evolution: The Carpatho-Balkan-Dinaric Region, the cave is 9,407 metres (5.845 mi) long. The cave is situated near the entrance of the deep canyon carved into the mountains by... (Wikipedia)