Iowa's cave networks are well known, including the world-famous Maquoketa Caves - an inviting, well-traveled cave system that sees countless visitors each year. The Hawkeye State has a few other cave systems, many of which are popular tourist spots. But did you know none of these are the largest cave in Iowa? That goes to Coldwater Cave, located in Decorah's Cold Water Spring Nature Preserve. You've never heard of it? There's a reason for that - this secret cave in Iowa is not open to the public, and it hasn't even been fully explored yet! Discovered in 1968 by two University of Iowa students, this mysterious cave is located on private property and is still being explored by experienced speleologists - some of which provided us with detailed video footage that gave us our best look yet at this natural wonder!
The bucolic small town of Decorah is a great place for a day trip - but around 18 miles away, you'll step into another world.
Cold Water Spring Nature Preserve in the Driftless Area is a gorgeous natural area that's a popular spot for hiking along the natural spring.
The high cliffs provide some beautiful sights, especially in the fall.
Along the way, you'll see entrances to what look like some small caves - but none is the mysterious Coldwater Cave.
Coldwater Cave is located on private land, and exploring by hobbyists is strictly prohibited. The cave is deep, challenging, and only being explored by experienced speleologists and researchers.
However, that doesn't mean you can't experience what it's like inside this ancient cave full of secrets. The best look we've gotten of the cave yet comes from an extended expedition that was broadcast on Iowa PBS. It revealed a hidden world of deep caverns and stunning rock formations that were formed over millions of years.
Have you heard about Coldwater Cave in Decorah? You probably haven't been inside this secret cave in Iowa - unless you're one of the Hawkeye State's top speleologists - but let us know about your own cave adventures in the comments section! Iowa DNR detailed the progress in mapping Coldwater Cave on its website if you want to read more.
Subscribe to our newsletter
Get the latest updates and news
Thank you for subscribing!