One of the experiences on our Iceland tour was swimming and bathing in the Blue Lagoon. The Blue Lagoon is a man-made geothermal spa set on a lava field which is fed by the water output of the nearby geothermal power plant. The lagoon is as large as a lake with several geothermal hot spots. All in all it was like a massive hot tub except that you could move to warm spots and to hot spots. On the floor of the lagoon was a layer of silica, which felt like sticky mud. Of course we smeared the silica all over our faces like everyone else in an effort to improve our skin. We experienced it in the cold, wind, and rain, which made it even better.
This is one of the most visited attractions in Iceland. It is located between the Keflavik International Airport (12 miles) and Reykjavik (24 miles), the capital of Iceland.
Note to travelers: If you are going to Europe and you are flying Icelandic Airways, all planes arrive and depart in their hub, Keflavik International Airport. You can break your trip into two by stopping in Reykjavik, taking a day or two detour to see some of the Iceland sights before continuing your journey to Europe.