Thacher State Park, is situated along the Helderberg Escarpment, one of the richest fossil-bearing formations in the world. Even as it safeguards six miles of limestone cliff-face, rock-strewn slopes, woodland and open fields, the park provides a marvelous panorama of the Hudson-Mohawk Valleys and the Adirondack and Green Mountains. The park has volleyball courts, playgrounds, ball fields and numerous picnic areas with nine reservable shelters as well as a visitor's center. Interpretive programs are offered year-round, including guided tours of the famous Indian Ladder Trail. There are over twelve additional miles of trails for summer hiking and mountain biking, and winter cross-country skiing, snowshoeing, hiking, and snowmobiling. The Emma Treadwell Thacher Nature Center is located 2 miles from the park on Thompson's Lake. The center opened in July 2001 and offers exhibits, interactive displays, trails for hiking and skiing, and educational programs. A Path Through History attraction.