File:Crater Lake, Crater Lake National Park, Crater Lake, OR - 53849296088.jpg

English: Established in 1902, Crater Lake National Park is located in the State of Oregon, and is situated atop the remnants of Mount Mazama, which collapsed following an eruption circa 5,700 BCE, which created a 4,000 foot (1,200 meter) deep caldera that today contains Crater Lake. The eruption and collapse of the mountain was witnessed by the indigenous people of the region, including the Klamath people, who live nearby, and have folklore related to the eruption. The lake was unknown to European-Americans until 1853, and became the lifelong obsession of William Gladstone Steel, whom began documenting the lake and surrounding landscape in 1870, lobbying for the creation of the park to permanently protect the lake and surrounding landscape. The lake for which Crater Lake National Park is named is 1,949 feet (594 meters) deep, with an average depth of 1,148 feet (350 meters), making it one of the deepest lakes in the world, and the deepest lake in the United States. Within the lake is Wizard Island, a small cinder cone that rises 755 feet (230 meters) above the lake, the result of volcanic activity subsequent to the eruption that caused the collapse of Mount Mazama. Elsewhere in the park is a large field of pumice, known as the Pumice Desert, Mount Scott, another cinder cone that rises east of the lake and is the tallest point in the park at 8,934 feet (2,723 meters) above sea level, various other craters and cones, and an old growth forest. The park developed in the early 20th Century with the creation of highways through the park and various tourist facilities, including the Crater Lake Lodge, visitors centers, and ranger stations, which were predominantly built between the 1910s and 1940s, with another period of construction in the 1950s and 1960s. Today, the park is a popular tourist destination in Southern Oregon, and sees approximately half a million visitors annually.