Maquoketa Caves State Park  

Maquoketa Caves is probably Iowa's most unique state park. Its caves, limestone formations and rugged bluffs provide visitors a chance to "step back" into geological time thousands of years. Caves vary from the 1,100' Dancehall Cave with walkways and lighting system to Dugout Cave. The remaining caves are all different sizes and shapes. Some can be explored by walking while others can best be seen by crawling. In any case, a flashlight and old clothes and shoes are most helpful.