Beautiful sauna and with a view.
If that small circular cut-out is a spa then I have died and gone to heaven. Californian cabin of Architect Olle Lundberg.
Dry Heat: A Private Sauna on a Swedish Fjord: General Architecture Private Sauna in Sweden
Sauna Grotto par Partisans - Journal du Design
Students from the Oslo School of Architecture and Design have designed and built a seaside sauna made up of three wooden bands.