On a budget, weigh it — Volcanic Hot Springs isn't cheap for what it is.
Included in boat trips
A novelty more than a spa: the water is warmer than the sea and the rust-red minerals supposedly do your skin good, and it's fun to swim into a volcanic cove. The catch is that it's often only a couple of degrees warm, murky, and can stain swimwear orange. Pleasant as part of a wider boat trip, not a destination on its own.