#17 Airplane Mystery.
The one that immediately comes to mind for me is the Great Mull Air Mystery.
Christmas Eve 1975 a guy decides to go on a drunken night flight from the Glenforsa airstrip, a small grass airstrip on the Isle of Mull owned by the Glenforsa Hotel, in a Cessna he rented from the hotel manager. He takes off, and disappears. His dead body was later found in a felled tree a few months later, with no trace of salt or marine life on him, or his clothes
In the 2000s a handful of Royal Navy ships were mapping for Naval Mines off Oban, when they found an aircraft that was possibly his, with the doors locked from the inside, no windscreen, and missing a wing.
