Somme - Lochnagar Crater

Lochnagar Crater

In preparation for the assault on La Boiselle two large mines had been laid under the salient formed by the trenches around La Boiselle. To the north was Y Sap, 40,000 pounds, and to the south, Lochnagar, 60,000 pounds.

The mines were detonated 2 minutes before zero hour, the crater left by the Lochnagar explosion remaining to this day.
http://www.flashearth.com/?lat=50.015601&lon=2.697328&z=15.1&r=0&src=msl

 Friends of Lochnagar Crater