Diving a caldera (volcano lake)

Well...it was....refreshing! We had a 7mm full body wet suit plus another 7 mm shorties! After 45 min, your are happy to feel the sun again! Marco's point of view gonna be probably different but there weren't much to see. A few crabs and fishes. The highlight was probably at the end of the dive when at some point we could dig with our hand for a warm earth. Delightening