Wisconsin Dells is a city in south-central Wisconsin, with a population of 2,418 as of the 2000 census. It is located partially within four counties: Adams, Columbia, Juneau, and Sauk. The city takes its name from the dells of the Wisconsin River, a scenic glacially-formed gorge that features striking sandstone formations along the banks of the Wisconsin River. Together with nearby Lake Delton, the city forms an area known as "the Dells", a popular Midwestern tourist destination. The Dells area has an estimated five million annual visitors. With 3 indoor waterparks and 18 outdoor waterparks in the Dells area, covering 70 acres (28 ha), Wisconsin Dells proclaims itself the "Waterpark Capital of the World". It is home to the largest outdoor water park in the U.S. , Noah's Ark; the largest indoor waterpark resort, Wilderness Territory; and America's largest water and theme park resort, Hotel Rome at Mt. Olympus Water & Theme Park. Some other attractions in the Dells include the Dells Boat Tours, numerous golf courses, mini golf, go-kart tracks, water sports, horseback riding, Tommy Bartlett's Thrill Show, Exploratory, the Ho-Chunk Casino and many other places of interest. Most attractions are located on the Strip, otherwise known as the Wisconsin Dells Parkway. Accommodations range from economical motels to RV parks, to chain hotels, to themed resorts featuring indoor and outdoor waterparks and other amenities. Because of its unique location within multiple counties, portions of Wisconsin Dells are associated with different Core Based Statistical Areas (CBSAs). The Columbia County portion of the city is considered part of the Madison Metropolitan Statistical Area, while the Sauk County portion is part of the Baraboo Micropolitan Statistical Area. The Adams and Juneau county portions of Wisconsin Dells are not part of any metropolitan or micropolitan area.