Closeup Shows A Cauldron Geyser Hot Water Mineral Pool Bubbling Steam West Thumb Basin, Yellowstone National Park, Wyoming, USA Stock Photo

Pools are steamy and hot. Photograph was taken from a boardwalk above so that looking down you can see what is inside the pond or geyser. The colors are usually deep with blues and yellows. Sometimes bubble rise to the surface and steam may come as well.Often the scent of sulphur is in the air.