Family pass gift certificate (for 2 adults and up to 3 children) for a walk tour of Black Chasm Cavern, a National Natural Landmark, in California's Mother Lode Gold Country. The tour begins by descending several steps from the visitor center to the cavern entrance. The trail in the cavern consists of 128 steps with viewing platforms in convenient locations. Descending into the immense Colossal Chamber, measuring 100-feet across and over 170-feet deepwith giant rock bridges lodged high above deep, dark lakes, is a breathtaking experience. Well-lit stalactites, long helicites, draperies, flowstone, and columns can be seen. While viewing these awesome wonders, visitors learn about the rich history and geology of this spectacular cavern as well as the surrounding countryside. www.caveandmineadventures.com