Iran's Ali Sadr Cave ‘too commercial’ for world heritage list

One of the natural wonders of the world is in the hills of northwestern Iran. Ali Sadr is the world's largest water-filled cave and attracts thousands of visitors each year. It once could have been a candidate to become a UNESCO world heritage site but not any more.

Al Jazeera's Zein Basravi reports from Ali Sadr village in Hamadan Province, Iran.

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