Steamboat Geyser, Geyser in Yellowstone National Park.
Steamboat Geyser, located in Norris Geyser Basin, is the world's tallest currently-active geyser.
It was first observed erupting in 1878 and has been studied extensively since then.
The geyser is a popular tourist attraction and symbol of the natural beauty of Yellowstone National Park.
Visitors can view the geyser from a boardwalk, but eruptions are unpredictable and can be dangerous.
Unlike most geysers, Steamboat's eruptions can eject water up to 300 feet into the air.
Location: Park County
Elevation above the sea: 2,316 m
Height: 120 m
Source: Wikimedia