Blue Lagoon, Grindavik, Iceland, 1998

Geysers, hot springs, and steam vents provide geothermal energy that heats 80 percent of Icelandic homes. In the Blue Lagoon, bathers from around the world come seeking the supposed healing properties of the waters.

(Photograph shot on assignment for, but not published in, "In Search of the Vikings," May 2000, National Geographic magazine)