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Caves of DrachThese four caves, with their weird formations and impressive chambers, are the most famous tourist attraction in Mallorca, Spain.
Postojna CaveThe most visited cave in Europe, and the biggest cave in Slovenia.
Yukama Crater LakeA crater lake located 150 kilometers from Tokyo.
Crystal Ice CaveThis ice cave in California has some interesting and strange ice formations.
Cheddar CavesA group of two caves, home to the oldest complete skeleton in Britain.
Carlsbad Caverns National ParkMore than 100 caves, 250 million years old.
Reed Flute CaveThis tourist attraction in China is over 180 million years old.
Luray CavernsA magic world is revealed when visiting the largest caves in Eastern America.
Fantasy CaveFantasy Cave is definitely one of Bermuda's secret treasures and a 'must see' attraction.
Grotte de DargilanOne of the largest natural caves in France, discovered in 1880.
Mammoth Cave National ParkIt preserves the world's longest known cave system, with over 360 miles of caves.
Baltoro GlacierWith a length of 62 kilometers, Baltoro is the longest glacier outside the polar regions.
Antarctica's GlaciersAntarctica is home to numerous glaciers and is a popular destination, with the number of tourists increasing to 35,000 per year.
Glaciers of KilimanjaroThey are not the largest in the world, but they are truly amazing and highly publicized, being a major attraction in Africa.
Aletsch GlacierThe largest glacier in the Alps, with a length of 23 kilometers and an area of 120 square kilometers.
Harker GlacierHarker is a tidewater glacier on South Georgia Island, in the Atlantic Ocean.