Maquoketa Caves State Park
Brandon Township, United States · built 1921
Maquoketa Caves State Park is a state park of Iowa, United States, located in Jackson County. It stands northwest of the city of Maquoketa. In 1991, 111 acres (45 ha) on the east side of the park were listed as a historic district on the National Register of Historic Places.
Park data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).