An official Path Through History Site! Ausable Chasm, also known as the Grand Canyon of the Adirondacks, has been open to the public since 1870 and is one of the oldest attractions in North America. The Chasm itself is even older than that—the naturally formed sandstone ages back 500 million years. Explore the chasm on nature trails with scenic vistas and waterfalls during the day or on special lantern tours offered some summer nights. Visitors can raft or tube in the chasm for the perfect adventure. The attraction also offers camping, horseback riding, biking on the 15 miles of trails, a restaurant, gift shop, and more.