(Iowa)
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. (Ref: https://en.wikipedia.org/wiki/Maquoketa_Caves_State_Park)