Points of Interest & Landmarks, Caverns & Caves, Geologic Formations Summer and Winter Seasonal Attraction. 23 Miles north of Lake George & 90 min south of Lake Placid, hike self-guided tour & explore the Largest Marble Cave Entrance in the East, waterfalls, gorge, caves and much more: guided adventure tours, gemstone mining, 18 hole disc golf, climbing walls, dino digs, picnic & playgrounds, and an extensive rock, fossil and gift shop. Rental units available. Weddings. Open every day late May - mid Oct (variable hours, check website) and Fri-Sun 10am-4pm from mid Dec - mid March for self-guided Snowshoe Tours on over 14 miles of trails exploring the Stone Bridge and surrounding property.