Colorado Meets South Dakota
Members of the Colorado Grotto were very active during the early 1960’s at Wind Cave. They were involved in extensive surveys around the Natural Entrance, the elevators, and Pearly Gates areas. New discoveries were made including the Xerox Room, the Popcorn Room, Independence Hall, Red Crystal Canyon, and Mammoth Canyon. Today this section of Wind Cave is referred to as the Colorado Grotto Zone of the cave.