The one in the United States belongs to the great volcanic field of the Northwest. Crater Lake of southern Oregon lies in the very heart of the Cascade Range, and, while it is especially attractive to the geologist on account of its remarkable geologic history, it is equally inviting to the tourist and others in search of health and pleasure by communion with the beautiful and sublime in nature. By the act of May 22, 1902, a tract around this lake having an area of acres was set aside as a national park.