Two Wisconsin state parks contain National Historic Landmarks, both of which are Native American archaeological sites: Aztalan and Copper Culture.
15 state parks contain a total of 23 separate listings on the National Register of Historic Places (NRHP).
The park consisted of 760 square miles (2,000 km2) in northern Wisconsin (most of present-day Vilas County).
Lumber barons were powerful in the area, and they purchased 2/3 of the state's land at $8 per acre.
[2] In 1899, the legislature approved the purchase of Interstate State Park and it was established on September 20, 1900.