One of the last things we did in Iceland was to make our way down to the Blue lagoon, a geothermal spa located in the South. It was an interesting experience to dip into the outdoor thermal pool set in a lava field, for the refreshing warmth was extremely comforting in the winter cold! The water is said to be extremely rich in minerals, which is excellent for the skin and health. They also had a special mud mask available that you could scoop a generous amount to slab onto your face, and later wash off with the water. Compared to Japanese onsens, the water was not boiling and was at a comfortable 40 degrees celsius max, but it also did not reek of sulphur which was a pleasant delight. There was nothing much beyond the pool for the standard ticket price (a whooping Euro 33 per entry), unless you purchase premier packages for the renowned spa, hotel and restaurant facilities. Being only 20 minutes from the international airport, it's a perfect layover stop if you happen to transit in Iceland.