TOURS & TRIPS Established as a National Natural Landmark in 1976, this stunning cavern with its spectacular foot-long crystal formations, huge rooms and deep lakes is a must see for cavern enthusiasts. Walk Tour This tour consists of a descent of about 60 feet, down five flights of stairs into the Main Hall Chamber. Well-lit stalactites, stalagmites, long helictites, draperies, flowstones, columns and giant keystone bridges lodged high in the walls can be seen. Visitors also view the clear mysterious lakes one hundred feet below, while learning about the rich history and geology of this spectacular landmark cavern as well as the surrounding countryside. The trail continues on further into the cavern, to the Colossal Room, crossing a bridge above an 80-foot drop to the lake below. It continues to wind around the cavern walls, and ends in the Landmark Room which contains the most spectacular arrays of helictite crystals in the known cave system. In addition to these beautiful features, other natural wonders can be seen, like the crystalline flowstone which emerges in a wave from a hole in the ceiling. The tour includes information on the cavern development method and what to anticipate as further phases of the trail are opened for viewing. Little bending is required but persons who have a fear of heights may be bothered. For safety reasons, we do not allow children to be carried or to be taken in back packs for this tour. Small children in front packs are okay with care Above Ground Activities/Amenities Gemstone mining, gold panning, nature hike, picnic tables, geode cracking, gift shop. Availability Tours leave approximately every 45 minutes throughout the day, between the hours listed below: SUMMER HOURS WEEKENDS, WEEKDAYS & HOLIDAYS First tour leaves at 9 am, last tour leaves at 5 pm WINTER HOURS WEEKENDS & HOLIDAYS First tour leaves at 10 am, last tour leaves at 5 pm. WEEKDAYS First tour leaves at 10 am, last tour leaves at 4 pm.