Three Sisters Springs, Crystal River, Florida, USA - Only kayaks, canoes, and swimmers are permitted in the area for the protection of the manatees This looks like a blast!
Three Sisters Spring
Flathead Lake, Montana USA
Pamukkale, meaning "cotton castle" in Turkish, is a natural site in Denizli Province in southwestern Turkey. The city contains hot springs and travertines, terraces of carbonate minerals left by the flowing water. It is located in Turkey's Inner Aegean region, in the River Menderes valley, which has a temperate climate for most of the year.
indoor pool // Juma Architects
Renting a glass igloo in Finland to sleep under the northern lights