Ice cave in ICELAND! Entering the deep blue of this 50 m ft) long, 10 m ft) wide and m ft) high ice cave on the frozen lagoon of the Svínafellsjökull glacier in Skaftafell, Iceland caused an awe-inspiring atmosphere. This up to 1000 years
Ruby Falls is a high underground waterfall located within Lookout Mountain, near Chattanooga, Tennessee in the United States. - Ruby Falls and the larger Lookout Mountain Caverns complex have been designated a National Historic Landmark.
I did this! the BOB (Breathing Observation Bubble) scooters in St John, Virgin Islands. Easy to do and a diver stays with you to keep you on the path. You are 17 ft under water, scooting over shipwrecks, coral and through schools of fish.