Pools don't get much better locations like that. Right by the ocean, surrounded by the Westfjords mountains, the swimming pool in Birkimelur makes sure you get to relax in a unique setting. The gorgeous views of Breiðafjörður bay also add to the already incredible backdrop to this little oasis. There's also a nice geothermal hot tub right by the beach.
NOTE: I think the price is around 1500 ISK (10 EUR/USD) but it's an honesty pool with a donations box by the dressing rooms (the local youth club owns and looks after the pool).
QUICK NOTES:
What it is: A geothermal pool and seaside hot tub in the Westfjords.
Best season: Any.
Best time of day: Any.
Nice to know: There are showers and changing rooms but minimal service outside of that. The hot tub can get very slippery!