Two galleries of dazzling limestone in the mountains of Lebanon: an upper chamber hung with some of the largest stalactites in the world, including a 8-metre column, and a lower gallery you tour by electric boat on an underground river that supplies water to Beirut. It was a finalist in the New7Wonders of Nature vote. <b>Note:</b> Lebanon carries travel advisories; check current guidance. PUBLIC when open, near Beirut.
Lebanon
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