You need to try at least one of the 120 pools in Iceland.

In Egilsstaðir there's a pool, two hot tubs, a kids pool, a cold pool, a sauna and a slide.

Just don't forget to shower naked before entering the pool. Icelanders are pretty intense about that. They don't put a lot of chlorine in the pool water in Iceland, so they expect everyone to clean themselves properly before entering the pool, so he pools will stay clean as well.