Two free admissions to explore Ausable Chasm-also includes a scenic float tour or tubing! Over 10 million visitors have explored Ausable Chasm, the oldest natural attraction in the USA (est. 1870)! The amazing sights of the chasm will take your breath away. Enjoy walking along our towering cliff walks in the midst of a primeval forest that peers into the chasm from many scenic overlooks and vistas. Descend 150 feet into the depths of the chasm to explore the natural stone walkways of our famous Inner Sanctum trail that have amazed guests for over 140 years! Sturdy walkways, bridges and stairs make this adventure possible - a unique experience that is not to be missed! While inside the chasm, ride the legendary Ausable River with your family in a river raft or choose a tube ride for a one-of-a-kind adventure.