Only in Your State has put together an incredible list of hidden waterfalls in Illinois that are waiting to be discovered. Hidden Waterfalls in Illinois You Need to SeeFrom easy strolls to more adventurous hikes, these trails will lead you through some of Illinois’ most breathtaking landscapes. Get our free mobile appSo, grab your hiking boots, pack a picnic, and get ready to chase waterfalls, Illinois style. Known for its long hikes, hidden waterfalls, and extensive trail system, it consistently makes the list of Illinois’ top outdoor attractions. 9 of the Most Hates People From Illinois Not all celebrities from Illinois are loved by Illinoisans.