Getaways with sauna

Allgäu, Bavaria

Ten wood igloo-shaped tiny houses sit on a swimming lake at Campingplatz Röhrenmoos near Wangen im Allgäu, with sauna and kitchen included.

Olympic Peninsula, Washington

A treehouse with a hot tub, sauna, cold plunge and fireplace, sleeping up to 10 guests near the San Juan Islands, Washington.

Santa Teresa, Puntarenas

A 13-bedroom treehouse retreat near Playa Hermosa in Santa Teresa, Costa Rica, built around a large sauna and jungle lookout decks.

Asheville, North Carolina

A-frame cabins, a treehouse, and a creekside sauna and cold plunge spread across 38 wooded acres near Asheville in Zirconia, North Carolina.