In September 1944 the world's first full-scale plutonium reactor went critical beside the Columbia River, then shut itself down a day later. B Reactor made plutonium for Trinity and Nagasaki, ran on into the Cold War, and now takes visitors on free tours.
Bakić's 37-metre monument to the 1941 uprising once glittered with Swedish stainless steel above the forests of central Croatia. Now it is stripped, graffitied and carrying phone antennas, and a Netflix crew has filmed in it.
In December 1943 the 150 people of Imber were told to leave their Wiltshire village for a few months so American troops could train there. They never came back, and the village still stands empty inside an army firing range.
Prora was meant to be a seaside holiday camp for 20,000 workers, a block of concrete 4.5 kilometres long on Rügen's Baltic coast. The war stopped it before a single holidaymaker arrived, and the shell went on to serve three armies before the luxury flats moved in.
Okunoshima is famous for the hundreds of rabbits that greet every ferry, but from 1929 to 1945 it was a secret island where the Imperial Japanese Army made thousands of tons of poison gas.
Along France's Atlantic coast, Germany built vast concrete bunkers for its U-boats during the Second World War. Bombers could not break them, and today they are museums, art galleries, naval stores and silent ruins.
On the cliffs near Cap Gris-Nez, four huge concrete casemates once held German naval guns that could hit the English coast. One of them is now a museum, and the rest still stand in the fields.
Between 1943 and 1945 the Nazis dug into the gneiss of the Owl Mountains in Lower Silesia, using thousands of forced labourers to build seven underground sites. Nobody knows for sure what Project Riese, the Giant, was meant to be.
On 10 June 1944, four days after D-Day, a Waffen-SS company killed 642 people in a quiet village in west-central France and burned it. The ruins have never been rebuilt, and visitors still walk its streets beside the tram rails.
Hashima is a six-hectare rock off Nagasaki that held 5,259 people at its 1959 peak, packed into concrete apartment blocks around an undersea coal mine. Mitsubishi closed the mine in January 1974 and the island was emptied by April. It is now a World Heritage site, and its wartime forced-labour history is still disputed.
