25 Best Cave Dives in Illinois

Cave diving is an exciting adventure that allows travelers to discover stunning underwater worlds. In Illinois, the landscape is dotted with caves that cater to divers of all skill levels. Each site presents unique features, from incredible rock formations to diverse aquatic ecosystems. In this guide, we will highlight the top 25 cave diving spots in Illinois, offering you a glimpse of what awaits below the surface.

1. The River of Rocks

Eye-level view of an underwater cave with intricate rock formations — Intricate rock formations in an underwater cave of The River of Rocks.

Located in the picturesque Shawnee National Forest, The River of Rocks is perfect for divers. The clear waters allow you to easily navigate around sunken boulders. Here, you can spot various fish species, including bluegills and catfish, swimming among breathtaking rock formations, some shaped over thousands of years.

2. Cave-In-Rock

High angle view of the entrance to Cave-In-Rock with sunlight streaming in — Sunlight streaming into the entrance of Cave-In-Rock.

Near the Ohio River, Cave-In-Rock is a must-see for divers. Known for its impressive stalactites and stalagmites, the expansive cave system is relatively shallow. This makes it accessible for both beginners and seasoned experts. You may even enjoy a dive at sunset, when the sunlight creates a magical ambiance inside the cave.

3. Mammoth Cave

Wide angle view of Mammoth Cave showcasing its vast underground space — Vast underground space of Mammoth Cave.

Within the Mammoth Cave National Park, this site boasts one of the most extensive cave systems globally. With deep pools and intricate formations, the dive offers thrilling exploration along lengthy submerged passages. Divers should come prepared, as navigational skills will help you safely maneuver through potential currents.

4. Saltpeter Cave

Close-up view of shimmering water in Saltpeter Cave — Shimmering water reflecting cave walls in Saltpeter Cave.

What makes Saltpeter Cave truly special is its luminescent mineral deposits and remarkable water clarity. While diving, take a moment to admire the glowing minerals lining the walls. Many divers report a feeling of tranquility here, making it an ideal location for a relaxing dive.

5. Little Grand Canyon

Eye-level view of the underwater entrance to Little Grand Canyon — Underwater entrance leading into the depths of Little Grand Canyon.

Primarily celebrated for its hiking trails, the Little Grand Canyon also has exciting dive spots. Unique underwater formations from the last Ice Age are ripe for exploration. Diving here requires care, as the ecosystems are sensitive and vital to local wildlife.

6. Possum Hollow Cave

Close-up view of the nature trail leading to Possum Hollow Cave entrance — Nature trail leading into the entrance of Possum Hollow Cave.

Possum Hollow Cave hosts an extensive underwater passage that invites experienced divers to explore hidden chambers. The diverse rock formations are captivating, providing chances to discover new routes and enjoy thrilling dives.

7. The Blue Hole

Wide angle view of the serene blue waters of The Blue Hole — Serene blue waters of The Blue Hole, ideal for cave diving.

Known for its vibrant blue waters, The Blue Hole offers perfect visibility for divers. The underwater landscape is rich with flora and fauna, making it a popular destination for underwater photographers capturing the enchanting scenery.

8. Pulpit Rock Cave

High angle view of the limestone formations in Pulpit Rock Cave — Limestone formations showcasing the depths of Pulpit Rock Cave.

Pulpit Rock Cave features stunning limestone formations that make for a remarkable diving backdrop. With a mix of shallow and deeper areas, it caters to divers of all experience levels, and you have the chance to witness amazing geological wonders up close.

9. The Great River Bluffs

Eye-level view of a tranquil underwater scene in The Great River Bluffs — Tranquil underwater scene in The Great River Bluffs, ideal for diving.

The Great River Bluffs feature underwater caverns that let divers explore the stunning river’s edge. Expect abundant aquatic life here, which provides an incredible opportunity to enjoy nature in its most engaging form.

10. Fish and Shrimp Cave

Close-up view of the fish swimming in underwater Cave of Fish and Shrimp — Fish swimming in the vibrant waters of Fish and Shrimp Cave.

True to its name, Fish and Shrimp Cave is a haven for aquatic life. Shifting underwater channels allow divers to observe various fish and shrimp swimming above colorful corals. It is particularly appealing for those keen on marine life.

11. Starved Rock State Park

Wide angle view of a cave entrance at Starved Rock State Park — Entrance of a cave at Starved Rock State Park with lush greenery surrounding it.

While Starved Rock State Park is known for its stunning views above ground, the caves below hold equal appeal. The winding underwater tunnels and stunning rock formations create a perfect setting for adventurous divers ready to explore.

12. Creekside Cave

High angle view of the calm waters within Creekside Cave — Calm waters reflecting the cave structures in Creekside Cave.

For a serene diving experience, Creekside Cave is an excellent choice. The calm waters and easy entry make it suitable for beginners. Divers can take their time to study the unique ecosystems, promising a rewarding dive into nature’s beauty.

13. Hogback Ridge Cave

Eye-level view of eerie shadows inside Hogback Ridge Cave — Eerie shadows within the depths of Hogback Ridge Cave.

Hogback Ridge Cave challenges divers with its intriguing tunnels and narrow, winding passages. As you explore, you’ll appreciate the geological formations and hidden chambers that make this dive both adventurous and rewarding.

14. Eagles Nest Cave

Close-up view of the rocky entrance leading into Eagles Nest Cave — Rocky entrance opening up to the vast waters of Eagles Nest Cave.

Eagles Nest Cave has a reputation for its natural beauty and elusive depths. The dark waters invite diving enthusiasts to uncover the secrets hidden within, offering a thrilling and mysterious exploration experience.

15. Spoon River Canyon

High angle view of the Spoon River Canyon showcasing rocky formations — Rocky formations bordered by the waters of Spoon River Canyon.

While Spoon River Canyon is known for its scenic hiking, it also allows divers an access point to its fascinating underwater features. A dive here can reveal a stunning world filled with natural beauty and rich biodiversity.

16. Black River Cave

Wide angle view of the diverse underwater ecosystem in Black River Cave — Diverse underwater ecosystem thriving in Black River Cave.

Diving in Black River Cave means discovering unique geological features alongside a rich aquatic ecosystem. The shimmering waters harmonize with vibrant flora and fauna, inviting divers to enjoy the beautiful environment.

17. Rock Island Cave

Eye-level view of the intricate rock patterns present in Rock Island Cave — Intricate rock patterns displaying the beauty of Rock Island Cave.

Rock Island Cave features dramatic rock formations that create a stunning diving environment. For adventurous divers eager for exploration, the intricate passages offer a captivating journey through this striking cave system.

18. Bristow Cave

High angle view capturing the sprawling underground landscape of Bristow Cave — Sprawling underground landscape within Bristow Cave filled with natural wonders.

Bristow Cave is famous for its expansive underwater terrain and awe-inspiring stalactites. The site welcomes divers of all skill levels, offering a captivating experience that captures the thrill of underwater exploration.

19. Shawnee Cave

Close-up view of the underwater chambers in Shawnee Cave — Underwater chambers showcasing the diverse wildlife in Shawnee Cave.

Shawnee Cave is a hidden treasure for divers. Its range of chambers and passageways creates an engaging ecosystem to explore. From sparkling waters to unique aquatic species, this dive promises a remarkable experience.

20. Limestone Cave

Eye-level view of the cool reflections in the still waters of Limestone Cave — Calm waters reflecting the rocky surroundings in Limestone Cave.

Ideal for novice and proficient divers alike, Limestone Cave boasts still waters and mesmerizing rock textures. The breathtaking scenery creates an unforgettable backdrop for your next dive adventure.

21. Frosty Cave

Close-up view of the icy waters shimmering in Frosty Cave — Icy waters exhibiting their shimmering beauty in Frosty Cave.

Frosty Cave lives up to its name, providing a cooler underwater environment. As divers explore the unique formations, they are sure to be amazed by the beauty of this icy underwater world.

22. Whistler Cave

High angle view of the mysterious entrance of Whistler Cave — Mysterious entrance leading into the depths of Whistler Cave.

Whistler Cave is famed for its intriguing acoustics and lively underwater activity. This distinctive setting permits divers to enjoy the beauty of nature while navigating winding passages.

23. Camden Cave

Wide angle view of the sunlit entrance to Camden Cave — Sunlit entrance welcoming divers to explore Camden Cave.

Camden Cave showcases awe-inspiring underwater landscapes, inviting adventurers to dive in. The captivating rock formations and abundant aquatic life create a memorable diving experience for all.

24. Bacon Creek Cave

Eye-level view of calm waters creating reflections in Bacon Creek Cave — Calm waters in Bacon Creek Cave presenting a perfect reflective view.

Nestled in a quiet location, Bacon Creek Cave features pristine waters and serene surroundings. This lesser-known spot offers divers a chance for a secluded adventure, showcasing the beauty and tranquility of cave diving.

25. South Fork Cave

High angle view of the expansive underwater landscape of South Fork Cave — Expansive underwater landscape filled with geological formations in South Fork Cave.

Completing our list, South Fork Cave welcomes divers of all experience levels. Known for its unique geological formations, this dive provides a fantastic opportunity to observe the fascinating underwater beauty firsthand.

Final Thoughts

Cave diving in Illinois presents a wonderful way to explore breathtaking spots that many rarely see. With each dive, you’re not just witnessing captivating underwater landscapes but also engaging with diverse ecosystems that thrive beneath the surface.

As you prepare for your underwater adventures, remember to prioritize safety. Enjoy your time in Illinois’ enchanting caves, and may your diving experiences be both memorable and rewarding!

KW Adventure Explorer