Wrecker's ball hovers over compound that housed top German officers ? and was targeted by Hitler In the attic of Building 4 at 2020 Lambs Rd. in Bowmanville, there's a pile of dirt. Stashed there by inmates of Camp 30 in 1943 and somehow left untouched for 65 years, it's evidence of how Nazi prisoners of war, at Adolf Hitler's bidding, once tried to dig their way out. Historian Lynn Philip Hodgson dreads the day, likely this spring, that a developer's bulldozer razes Building 4, along with the rest of the only intact camp for German prisoners of war that we know of still left in the world. Camp 30, a collection of 18 buildings on 40 hectares of rural land about 45 minutes east of Toronto, is the only one used by the Allies to house high-ranking Nazi officers captured during World War II. Among them was a top U-boat commander Hitler hoped to rescue by sending a submarine down the St. Lawrence River. Over eight months, prisoners used tin cans to dig a 90-metre passage 4.5 metres underground into a cornfield, depositing the earth in the attic of "Haus IV." But the ceiling collapsed from the weight, revealing the tunnel's existence before anyone could escape...... TheStar.com | Ontario | D-Day in Bowmanville for Nazi PoW camp POW Camp 30 Bowmanville Ontario on Flickr - Photo Sharing! The camp also inspired the movie the McKenzie Break after the Battle of Bownamville.