11) Spring Mill State Park

At Spring Mill State Park, visitors can explore the park's four interpretive facilities—the Pioneer Village, Nature Center, Grissom Memorial, and Twin Caves Boat Tour. The restored Pioneer Village, founded in 1814, contains 20 historic buildings to explore. The centerpiece is a 3-story limestone gristmill, built in 1817, that still grinds cornmeal today. Heritage interpreters portray the year 1863 and demonstrate period crafts. The Grissom Memorial honors Hoosier astronaut Virgil "Gus" Grissom, one of the seven Mercury astronauts and America's second man in space. The Memorial tells the story of Gus Grissom's life and his contributions to the space program. Exhibits include Grissom's space suit, the Gemini 3 Molly Brown spacecraft, and artifacts from his personal and professional life.

This park had an estimated 649,552 visits during 2014/2015.

11. Spring Mill State Park

Source: Indiana Department of Natural Resources