With prolonged hot and dry weather, all kinds of treasures, ruins and remains are emerging from waters around the world as river and lake levels drop. ⁣ ⁣ In Serbia, the wreckage of a paddle-wheel tugboat built in 1913 emerged from the low waters of the Sava River. ⁣ ⁣ Historians say it sank in 1945, after striking a German mine while transporting supplies and wounded soldiers during the final days of World War II. ⁣ ⁣ The wrecks of World War II-era German ships resurfaced along the Danube in Serbia, exposing vessels sunk at the end of the war by the retreating Nazi army. ⁣ ⁣ In England, a mystery sword protruding out a lake at Chiddingstone Castle in Kent could be about 200 years old.⁣ ⁣ In Bulgaria, the remains of what is believed to be an ancient mammoth were revealed after Danube River water levels receded to a record low level. ⁣ ⁣ And in Rome an ancient Roman bridge resurfaced from the river Tiber due to very low-water levels.⁣ ⁣ It's traditionally known as Nero's Bridge after a ...