B/ON-1487 is a German World War I bunker located within Tyne Cot Cemetery near Passendale, West Flanders, Belgium. The structure was originally part of the German defensive line during the Third Battle of Ypres (Battle of Passchendaele) in 1917. After the war, the Commonwealth War Graves Commission incorporated the bunker into what became the largest Commonwealth war cemetery in the world, using it as a central feature.
The bunker stands as a stark reminder of the intense fighting that took place in this region during the First World War.