silex spring is a beautiful blue hot spring in yellowstone national park

amazing america area background bacteria beautiful beauty blue brink canyon cascade cliff colorful countryside crust deafening drive environment erosion eruption explore fall falls famous firehole forest geological geology geothermal geyser grand heat horizontal hot jetting lake landmark landscape lower minerals national natural nature outdoor outdoors overlook park photo pool river rock scenery scenic silex spring steam stone super tom toms tourism trail travel upper usa valley vent vertical view volcano water waterfall wilderness wyoming yellowstone