Diros Caves
The Diros Caves in Greece were discovered in 1958. The cave is covered in stalagmites and stalactites, some measuring over 487 metres tall.
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Devetashka Cave
This enormous cave in Bulgaria was once inhabited by thousands of humans. Now that humans no longer live in it, around 30,000 bats have made it their home. One of the unique features about the Devetashka Cave is that seven holes in the top of it allowing sunlight to come through and illuminate the space below.
Stopića Cave
The Stopića Cave is located on the left bank of the Prištavica river in Serbia. The main attraction of the cave is the underground waterfall that measures almost 10 metres high.