Yellowstone includes the world's tallest active geyser (Steamboat Geyser in Norris Geyser Basin). The tallest active geyser in the world, Steamboat Geyser, is located in Norris Basin. Saez said the Fly Geyser is unlike any other geyser she has studied. Iceland has many geysers, including Geysir, from which the English word "geyser" is derived. The other three predictable geysers are Grand Geyser, Daisy Geyser, and Riverside Geyser. The average geyser eruption height at El Tatio is about . There are viewing platforms at either end of the travertine mound where the geyser erupts. Sometimes there is enough pressure that the water shoots upward in a geyser, or fountain. The Yellowstone National Park quarter also features a bison standing next to a geyser. For example, temperatures exceed in Old Faithful, a geyser in Yellowstone National Park. It is located in the Midway Geyser Basin. The English word "geyser" (a periodically spouting hot spring) derives from Geysir. Castle Geyser, Lion Geyser and Beehive Geyser are in the same basin. Examples of natural aerosols are fog, mist, dust, forest exudates and geyser steam.