The actual entrance point is a miniscule crawlway at the summit of fifty or so steps from the road.
Note this is a temple, so if you don't have one you'll need to rent a sarong and sash from the shop at the base for 5,000 rupiah.
Once at the summit you need to crawl through the entrance way into a cavern that opens up to quite a large cavern. There's a shrine towards the far end and then the cave narrows again before you reach the second opening that looks onto a tight lush valley.
To get here follow the round-island road past Sampalan towards Suana. The temple is around 8km past Sampalan and is clearly marked.
Last updated on 6th July, 2011.