Mainstream Adventures

When You Constantly Push Your Limits You Will Never Reach Them

Enjoy a Tour of the Midwest’s Best Show Cave’s

Some people may not realize it, but the Midwest is packed with caves.  In fact Missouri is known as the cave state, due to the numerous caves found throughout.  Just about every state in the Midwest has a cave or two.   Some are wild, like the ones found in Maquoketa Caves State park in Iowa.  Others have been commercialized and turned into tourist attractions.   In this article we will take a look at some of our favorite show caves around the Midwest.


Crystal Lake Cave: Located 5 miles south of Dubuque, Iowa, near the Illinois and Wisconsin borders.  What makes this cave so special, is not just the number of pristine crystal formations, but the quality of these formations. The beauty of this cave is unequaled in Iowa, and just about everywhere else.   Cave tours take about 45 minutes, and consist of a 3/4 mile walk through flat, lit, paved passages.   In 2016 they also started offering Wild cave tours, for the more adventurous cave enthusiasts.  These tours are an hour and a half long, and consist of exploring the uncharted passages of the cave.   Crystal Lake Cave also has a gift shop and Mining Sluice, as well as a picnic area. Mention Mainstream Adventures and receive a free flash light!  For more information call 563 556-6451

Spook Cave: Located in McGregor Iowa, the Spook Cave campground is one of the most sought after campsites in all of Iowa.  After taking a visit it’s easy to see why.  This campground has its own beautiful waterfall, a lake for swimming, beautiful cabins,and don’t forget the cave tours.  Cave tours depart every half hour and take about 45 minutes.  All tours are done by boat. The cave was discovered in 1953 and opened for business in 1955. For more information call 563 873-2144


Niagara Cave: Located on Minnesota’s southern border in the town of Harmony.  This geological marvel was discovered in 1924, and opened to the public in 1934.  Consistently rated as one of the top 10 show caves in North America, people travel from all 50 states and over 100 different countries to take the hour long guided tour through the cave. The tour has been described as an educational adventure in nature that you won’t want to miss!  The Niagara Cave is one of the most unique geological locations in the state featuring 100-foot high ceilings and 450 million year old fossils, but the highlight of the tour is the 60 foot waterfall.  For more information call 507 886-6606


Cave of the Mounds: discovered in 1939 in Blue Mounds, Wisconsin.  Often referred to as the jewel box of American show caves. Cave of the Mounds has been offering guided tours for over 75 years, and in 1988 the cave was designated a National Natural Landmark by the United States Department of the Interior and the National Park Service.   Guided tours of this underground wonderland last one hour, and take place on flat, paved, lit, walkways.   The tour will take you past an amazing array of crystal formations, stalactites, stalagmites, and columns.  They also have a fossil dig, butterfly garden, and gift shop.  For more information call 608 437-3038


Marengo Cave: Located in Marengo Indiana, this lesser known of the Midwest show caves sure packs a mighty punch with 6 different cave tours available.  Regardless of which tour you choose your sure to have an amazing experience.  This cave features several different types of mineral formations  from Helictites  to soda straws, from Stalactites, to  Cave Popcorn.  This cave really has it all.  Discovered in 1883, by children using only candles to navigate all the underground twists and turns.  Since that time Marengo Cave has had more then 3 million visitors explore its passageways.   For more information call 888 702-2837 


Talking Rocks Cavern: Discovered in 1883 by rabbit hunters, Talking Rocks Cavern has been referred to as Missouri’s Most Beautiful Cave, and with more then 7000 caves in the state that’s quite an honor!  Cave tours consists of an hour long walk taking visitors on a breathtaking vertical decent into a subterranean wonderland.  With World Class formations, natural beauty like this is a sight to behold in Talking Rocks Cavern.  For more information call 417-272-3366

Fantastic Caverns: Discovered in 1862 by an Ozark farmer just northwest of Springfield, MO., is one of more than 5,600 known caves that dot the Missouri landscape, and more are still being discovered. Of these, just 18 are open to visitors — and only one offers a riding tour.   Today’s riding tour tells a  story. Along the roomy, brightly lit passageways, visitors can see thousands of speleothems — cave formations that include stalactites and stalagmites, tiny soda straws, cave pearls, massive columns and flow-stones, thin and delicate draperies and more. These distinctive formations, each one like no other, and all created by water a drop at a time. Cave tours last about an hour and have a year round temperature of 60 degrees.  For more information call 417 833-2010


Lost River Cave:  The Cave Boat Tour begins with a leisurely stroll in the valley as your guide shares the tale of the blue hole and disappearing Civil War soldiers.  When you arrive at the massive cave entrance, prepare to board Kentucky’s only underground boat tour. Duck your head for just a moment as you glide under the famous wishing rock. Touch the cool limestone ceiling before the passage opens into a cathedral-like cavern.   Plan to spend about 45 minutes to an hour on this two-part tour.  For more information call 270 393-0077


  1. These caves look awesome! Which one is the best? I live in Chicago and would love to visit, but only have time to visit one this year. Great article!

    • They are all great in there own way. Tough choice on which one is the best. The problem is that this list is a list of the best of the best already, so to choose thee best is not easy. I say just pick one and plan a trip, with this list you cant go wrong.

  2. Great list of caves here! Been to 3 on the list, Crystal Lake Cave has by far the biggest collection of crystals i have seen in any cave.

  3. I have been to Niagara and The Spook Cave. Niagara is huge and has a beautiful waterfall, spook cave is small and cramped but still a lot of fun to tour. I need to hit more of these!

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