Best UFO Photograph, 1971-Costa Rica

September 4, 1971-An official mapping aircraft of the Costa Rican government took this photograph. The aircraft was flying at 10,000 feet over Lago de Cote. An investigation could not identify the object as a "known" aircraft. Debunkers took some stabs at it, but it is still recognized as authentic by most investigators. No "earthly" explanation has ever been given to explain the object.