WONOSARI, INDONESIA - SEPTEMBER 11. Indonesian cavers stands under Jomblang Cave in Wonosari, Yogyakarta, Indonesia on April 04, 2013. Jomblang and Grubug cave is a vertical cave with the deepest 80 meters which was found in 1984.

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Photo credit: © Tri Saputro / Alamy / Afripics
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