The warm water provides the perfect growing conditions for algae and water plants. These pictures don't do the view justice. The algae looked like long hair waving in the water. Kind of gross looking, actually.
Another close up of the algae.
We've driven North to Obsidian Dome. This dome is about one mile in diameter. Looking at the side here doesn't do justice to the immense size. This dome is made up of volcanic glass or obsidian.