Gary Sterne discovered the huge ‘Maisy Battery’ after he found a crinkled map which fell out of an old pair of US serviceman’s trousers at a military memorabilia fair in Stockport.

…

He discovered an extensive installation “the size of four football pitches“, including bunkers, offices, a sizeable field hospital – less its roof – and housing for 155mm cannon.

Very cool!

Part of the installation

More here