Talking of rare finds...check out this purpose built gun emplacement with remnants of its original camouflage paint and pitched roof to disguise it from the air.

Ellastone Camouflaged Gun Emplacement

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“This is a tale you will tell your grandchildren, and mightily bored they’ll be.” Lt. Gen. Brian Horrocks commander of British XXX Corps September 16, 1944 prior to Operation Market.