BBC
Syria ‘chemical’ attack: Douma’s warren of war tunnels revealed

Bomb-proof tunnels big enough to drive down: the war-torn Syrian town of Douma has been yielding up its secrets since rebels abandoned it this month after the suspected government chemical attack there.

The tunnels, fitted with electric lights, snake under the town.

The impressive structures have reinforced walls and are paved in places.

EPA
Exits to the daylight world quickly reveal why people sheltered so deeply underground.
EPA
Much of the former opposition bastion has been reduced to rubble.