In October 2019, archeology professor Ivana Pandzic made a shocking discovery near the Vrbas River in Bosnia. While studying a medieval fortress, her team found a sword lodged in a stone under the rapids, 36 feet below the surface. Despite being underwater for possibly hundreds of years, the sword was well-preserved. Some speculate if it could be the real Excalibur from the King Arthur legend, but concrete evidence is lacking. The mystery of how the sword ended up in the stone remains unsolved.