A drone view shows a sunken German warship from World War II, exposed due to low Danube River levels caused by drought and extreme heat, in Prahovo, Serbia, July 30, 2026. Historians say up to 200 German warships were scuttled in September 1944 near Prahovo in the Danube gorge as they came under Soviet fire. A drone view shows people swimming near a sunken German warship from World War II, exposed due to low Danube River levels caused by drought and extreme heat, in Prahovo, Serbia, July 30, 2026. In 2024, a trove of sunken Nazi ships, still decked out with explosives, emerged in the Danube following a blistering summer drought. Mammoth bones found on parched riverbedMeanwhile, falling water levels in the Danube unveiled bones of a mammoth in Bulgaria, a local museum director told AFP.