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No that's not sunscreen! - it's this very warm silica mask that is available to put all over your face while you float around in this huge pool of geothermal seawater that's led directly from its natural source to the Blue Lagoon.
Sauna... steam room.. cold mist.. hidden caves... massages if you so desire....
all good..
and really worth the visit. I was unsure at first due to tourist mania and the unknown, but it was way cool.. Oh, I mean HOT!