The Seljavallalaug Swimming Pool in southern Iceland. It was built in 1923 and was the largest outdoor 25 metre pool in Iceland until 1936.
Found by those despite the size:
- Phil Ower
- Walter_V_R
- Lighthouse
- Martin de Bock
- hhgygy
- Nancy Barbato Sinatra
- Garfield
- Farceur
After the hint:
- Eloy Cano