The massive Stone Bridge is the LARGEST marble cave entrance in the eastern U.S. and is still being carved by the beautiful Trout Brook. 

In summer, walk the self-guided and above-ground nature trail to witness this spectacular display of ancient Adirondack geology.  Our rustic stone-step and gravel trail features the old Sawmill Site Waterfalls, Artists' Gorge, incredible potholes and of course several surface caves.  Descend into lighted caves and grottos with raging water or tranquil dark pools.  For the more adventurous spirit, sign up for a guided summer Adventure Tour; a 3-4 hour spelunking cave crawl including a cave float! (Adventure Tour probably not available in 2023, self guided tour is available)

There are hourly start time limits and they are often booked full in July/Aug.  Make sure you reserve your spots at least 24h in advance.  Walk in spots are available if the hourly limit is not filled.  First come first serve for day of walk-in tickets.