Moving south after the Grand Prismatic Spring, the first next highlight is Biscuit Basin, within the Upper Geyser Basin. The bridge across the Firehole river towards Biscuit Basin is a good location to watch the Osprey, which is regularly hovering over the Firehole River looking for trout. Furthermore, there are various dragonflies flying over the geothermic field, apparently not that impressed by the hot water in the springs...