Clepsydra Geyser in Yellowstone National Park, Wyoming

Clepsydra Geyser just kept shooting water into the air. It was pretty due to the colors at the base of the geyser. It was named for a mythical water clock. In the early history of the park, it erupted with clock-like regularity. After the 1959 Hebgen Lake Earthquake it went into a "wild phase" since then it has erupted almost constantly.