The park also features caves, sinkholes, and bluffs overlooking the lake.

[6] Construction of the Ha Ha Tonka castle was started in 1905 by Robert McClure Snyder Sr., a Kansas City businessman who purchased the large property after first visiting there in 1903.

The building was used as a summer and weekend home by the Snyder family, who lived in Kansas City.

Although the castle walls were stabilized in the 1980s, a new survey in 2016 determined that portions of the ruins including its arches were seeing mortar and stone failure with the potential beginning of collapse.

The park has 15 miles of hiking trails leading to caves, sinkholes, natural bridges, and the castle.