The Cueva de Nerja is the big tourist attraction in Nerja, just off the N340, 3km east of town on the slopes of the Sierra Almijara. The enormous 4km-long cave complex, hollowed out by water around five million years ago and once inhabited by Stone Age hunters, is a theatrical wonderland of extraordinary rock formations, subtle shifting colours, and stalactites and stalagmites. Large-scale performances including ballet and flamenco are staged here throughout summer.
About 14 buses run daily from Málaga and Nerja, except Sunday. The whole site is very well organised for tourism, and has a huge restaurant and car park. A full tour of the caves takes about 45 minutes. Note that there is no extra charge for guided tours.