Explore underwater archaeologist Fritz Hanselmann's expedition to Panama's historic Chagres River, where the search for Henry Morgan's lost 1671 flagship led to the remarkable discovery of Encarnación—an intact 17th-century Spanish merchant vessel with perfectly preserved cargo. This photographic journey documents colonial cannons, underwater excavations, and Fort San Lorenzo's ruins, revealing how one archaeological quest unexpectedly uncovered 'the holy grail of Spanish colonial shipwrecks.