Later we went back to the hostel, checked in, took a short nap, then drove to the Blue Lagoon for a "spa" experience. The water comes out of the ground hot enough to drive an electricity generator, then is routed into the man-made lagoon, where literally hundreds of people soak every day. The water has a high concentration of silica, which makes it very opaque and blue. The water is about 103 degrees and about 4 foot deep, and very relaxing.
Dinner at a very nice local restaurant: