A playground for yachters, tourists and jet setters, modern Bodrum stands on the site of the ancient city of Halicarnassus. You can still see the foundations of the mausoleum, one of the Seven Wonders of the Ancient World, which was destroyed by earthquakes. The Knights of St. John used its stones to build Bodrum Castle, fascinating not only as a medieval monument but also for the Museum of Underwater Archaeology within its walls, which includes a display of the oldest known shipwreck.