Wilderness Territory is a large water resort in Wisconsin Dells, Wisconsin. It is one of the largest indoor waterpark complexes in the world with a combined size of 240,000 square feet (22,000 m2). It is part of a chain of two resorts, the newer and smaller one being Wilderness at the Smokies in Tennessee. The chain also includes four small outdoor waterparks.
In 1995, the Wilderness Hotel and Golf Resort opened for business along U.S. Highway 12 (Wisconsin Dells Parkway) with a 35,000-square-foot (3,300 m2) water park named Fort Wilderness. In 1999, the hotel added its second indoor waterpark, Klondike Kavern, and an additional sixty guest rooms.
In 2002, the resort opened the Wild West region of the hotel which has 162 guest rooms. It also includes Dodge ‘Em City, a 30,000-square-foot (2,800 m2) indoor play park featuring Timberland Playhouse and Lake Wilderness outdoor waterpark. In 2003, the Wild West Waterpark opened for business.
In 2003, a 108-condominium, upscale resort, called Wilderness on the Lake, opened for business. It is home to Cubby's Cove, a 35,000-square-foot (3,300 m2) indoor/outdoor waterpark complete with an Infinity pool overlooking Lake Delton.
In the summer of 2005, to mark the resort's 10th anniversary, the Wilderness Hotel & Golf Resort opened two thrill rides, the Hurricane and Black Hole waterslides.
In April 2006, the Wilderness opened its largest indoor waterpark yet, the Wild WaterDome. This 70,000-square-foot (6,500 m2) waterpark is home to a large indoor wave pool, the Dueling Mammoths family raft ride, and a toddler play 'n spray area. The waterpark also features a FoilTec roof that is permeable to UV rays, allowing people to tan indoors. The resort also closed Fort Wilderness Waterpark, its first indoor waterpark.
In July 2006, Glacier Canyon Lodge, the Wilderness's third property, opened along with a 3.2 acre outdoor waterpark called the Lost World.
In 2008, the Wilderness unveiled Wild Rock Golf Club, a championship 18-hole course containing a difficult hole 17 called "Boneyard North", and renovated the Klondike Kavern waterpark.