Salah Babhair

Yemen’s mysterious 'Well of Hell'

Surrounded in mystery and tales of demons, the Well of Barhout in Yemen's east - known as the "Well of Hell" - is a little-understood natural wonder.

Closer to the border with Oman than to the capital Sanaa 1,300 kilometers (800 miles) away, the giant hole in the desert of Al-Mahra province is 30 meters wide and thought to be anywhere between 100 and 250 meters deep.