world’s longest watercave
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world's longest watercave
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Ali Sadr Watercave – Hamedan
Ali Sadr near Hamedan (about 80km from the city) is the world’s largest water cave. For many years the exploration of the cave progressed slowly. It was only in 2001 that with the help of a German/British expedition, a great progress was made in surveying 11 kilometers of the cave.Read More …