The 220-foot wooden-hulled steamer SS Brother Jonathan was overcome by a violent storm on July 30, 1865, just north of Crescent City, California. The steamer sank in less than 30 minutes. Gee discovered the wreck of the paddle steamer Brother Jonathan, lost 22 years ago.” Even so, CoinWeek says “many estimate that 80% of the total value of the treasure still remains undiscovered.” (Image: SS Brother Jonathan)