These limestone caves hold a secluded Hindu temple. Very off the beaten path - take a torch or other light with you.
More information on baliheaven.com http://www.baliheaven.com/blog/tag/goa-karang-sari
Address Jalan Batununggal - Suana, Nusapenida, Indonesia
Coordinates -8°43'13.526" N 115°35'38.817" E