This is a one of a kind dive! You have to walk up and down steps in full dive gear which I was dreading but managed just fine. You descend through different thermal layers on the way down. Starts at around 80 degrees, next layer around 100 degrees, then cooler again. This you can only appreciate by diving, not snorkeling. Once at the bottom you enter a zero visibility section which is creepy. There is also a huge layer of mucky mud at the bottom. The walls of the lake are stunning limestone formations. A must do! Costs 100php to get access to the lake.