'Like another planet': Malham salt cave is world's longest, say researchers

Survey says cave stretches for six miles, beating Iran's Namakdan cave in length

Dripping with stalactites and glistening crystals made of salt, the Malham cave at the southern tip of Israel's Dead Sea is the world's longest salt cave system, researchers have claimed, following a survey of its twisting and dramatic tunnels.

The cavern, which extends over six miles (10km) underground, is believed to be even more extensive than Iran's Namakdan cave, which was previously thought to be the longest salt cave.