Outside the famous Blue Lagoon spa, near Reykjavik’s airport, is a strange and bizarre landscape. The area is covered in black basalt rocks, a sign of geothermal activity. There are no trees or green plants, just a fuzzy white moss that grows on the black rocks. The water that springs from the ground has a high level of dissolved silica, which precipitates when the water cools. This creates a blanket of white mud that lines the small lagoons. The white lining combined with algae create unnaturally looking milky blue water.
Another image of the blue water. A geothermal energy plant operates in the background. I spent an afternoon at the spa, it was very relaxing.