This park is home to a spectacular show cave, which is a National Natural Landmark. Tours are offered seasonally. The park features Meramec River access; camping; scenic hiking trails; a lake; picnic sites; and a shelter. The park is located seven miles southeast of I-44 on Route H.
Admission to the park and visitor center is free. Check the website for cave tour times and fees.
The park and visitors center is ADA compliant, but Onondaga Cave itself is not wheelchair accessible.