Blue Lagoon, Iceland
The Blue Lagoon is one of Iceland's main attractions. Less than an hour’s drive from Reykjavik, this man-made body of water was formed in the 1970s using the output from a geothermal power plant. The water is rich in silica and sulfur. During the early years of the lagoon's existence, people would come to take a dip in the warm (99–102 degrees Fahrenheit) ponds. Those with skin problems like psoriasis began to notice major improvements after their swim. This led to facilities being designed for use by the general public in the late 1980s and early 90s.
The Blue Lagoon is indeed blue. It has a kind of milky sky color because of all the silicate minerals that it contains. Rates for soaking start at approximately $50 (depending on the exchange rate), but over the years the facility has developed to include a spa that offers different skin and general wellness treatments for an additional cost.