Stalactites in hues of brown, black and white hang from the ceiling inside Iowa’s Spook Cave. (Jay Jones / Chicago Tribune)
Caves across the Midwest.
Tour guide Bryce Decker uses a flashlight to point out some of the unique features inside Spook Cave. (Jay Jones / Chicago Tribune)
Dressed for the chilly weather inside, guide Bryce Decker motors a small boat beside Spook Cave near McGregor, Iowa. (Jay Jones / Chicago Tribune)
A small boat exits Iowa’s Spook Cave, following a 35-minute tour through the flooded cave. (Jay Jones / Chicago Tribune)
