This adventurous family outing starts with a 45-minute, professionally guided walking (you don't have to spelunk) tour that ends 165 feet below ground. Explore the magnificent natural wonder and then return topside and zip down the mountain on the 1,500 foot zip line! Certificate good for one (1) family tour (2 adults and 3 children ages 3-12 and one (1) zip line ticket. No cash value.