Seven days of no
swimming makes one
Why locals love it
One of the biggest pools around and you can always find a lane for yourself. The sauna is decent, but the pool is the attraction. It has a competitive size and the hot tubs are good.
Why you should visit it
Since this is stationed in Kopavogur, the tourists don't come here so often. It has a nice slides for the kids, as well as a small pool for the infants. Perfect for the small families.
Get yourself familiarized how the lane system works, otherwise you'll get an evil eye from the locals.