The Old Faithful Geyser in the World Heritage Site of Yellowstone National Park erupts under the stars during a summer evening in Wyoming, United States. The geyser is known as one of the most predictable natural landmarks in the world, erupting in intervals of between 60 and 110 minutes. Stars of the Ursa Major (the Big Bear) are right above the eruption and two stars at the tip of the Big Dipper points to the North Star, Polaris, at the upper right. Wandering at Yellowstone in a summer night there is a good chance to face a big bear on the ground too! The eruption of this strong cone geyser can shoot 14000–32000 liters of boiling water to a height of 30–55 meters. The Old Faithful has been erupting at least since the late 1800s.