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It’s hard to imagine the surreal world that lies beneath the mountain foothills 4km east of Nerja, and it’s even harder to believe that these vast caverns weren’t discovered until five local chicos (young men) who had gone out looking for bats stumbled across an opening in 1959. Hollowed out by water around five million years ago and once inhabited by Stone Age hunters, this theatrical wonderland of extraordinary rock formations, subtle shifting colours, and stalactites and stalagmites is evocative of a submerged cathedral.
About 14 buses run daily from Málaga and Nerja, except on Sunday. Alternatively you can take a mini tourist train from Nerja's museum, or you can walk (there's pavement all the way).
The whole site is well organised for visitors, with restaurants, a car park and a short walking trail above the caves. A full tour of the caves takes about 45 minutes. Note that there's no extra charge for guided tours.