Phong Nha Cave. Vietnam - is a national park and UNESCO World Heritage Site. Phong Nha-Ke Bang area is noted for its cave and grotto systems as it is composed of 300 caves and grottos with a total length of about 70 km.
Ellison's Cave, Georgia- Fantastic Pit is 586' deep, which is the deepest known cave pit in the continental United States. This pit is big enough to hold the Washington Monument (555'). Photos cannot give this place any justice as to how huge it is!
Eisriesenwelt Ice Caves - The Eisriesenwelt is a labyrinth of caves with a total length of over 40 km. As is the case with all caves, their formation spans a long period of time. The first cracks and crevices in the limestone appeared during the elevation of the mountains approx. 100 million years ago and over the course of thousands of years became more developed and extended as a result of chemical reactions and water erosion.
Waitomo Glowworm Cave - is a cave on the North Island of New Zealand, known for its population of glowworms, thousands of these tiny creatures radiate their unmistakable luminescent light
Majlis al Jinn Cave - Majlis al Jinn is the eighth-largest cave chamber in the world. It is located in a remote area of the Selma Plateau at around 1,600 meters above sea level in the Sultanate of Oman. Access only through top holes and 140 meter rope,inner area approx. 200 x 300 meter, inner height between 120 and 150 meter.
Mexico's Cueva de los Cristales (Cave of Crystals) contains some of the world's largest known natural crystals—translucent beams of gypsum as long as 36 feet (11 meters). 68239
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