We based ourselves at a campsite called El Pino which is located in Torrox. The campsite is huge but also gets very busy so there was only some smaller pitches available in the shade. It cost 18 euros per night but the price drops down to 15 euros per night if you wish to stay 15 nights and decrease more the longer you stay. https://www.campingelpino.com/en/
If you look on the caves website you can book free tickets to enter the caves on weekdays at 9.30am. You can only book the tickets 48 hours in advance and there is 40 available. If you wish to have an audio guide you can also book this for 1 euro. We didn’t book the audio guide and assumed we could just get it when we arrived but you can not. We would recommend getting an audio guide otherwise you do miss out on some of the experience. http://www.cuevadenerja.es/en/
The caves were only discovered by 5 young friends in 1959 however they were formed 5 million years ago.
The giant stalactites and stalagmites are claimed to be the largest in the world and are very impressive.
Skeletal remains found indicate the caverns were inhabited from 25,000 BC and in 2012 some paintings were discovered that have been dated back to 42,000 years old and could be the oldest human artwork ever found. Unfortunately these parts of the caves are not currently open to the public.
The caves are definitely a must visit if you are in the area. Our visit took approx a hour and a half.