On December 9, 1965, residents of Kecksburg, Pennsylvania, witnessed a fiery object streak across the twilight sky before crashing into a wooded ravine. Within hours, U.S. military trucks sealed off the area, and witnesses described seeing an acorn-shaped craft engraved with strange symbols before it was taken away under tight security.

Location: Kecksburg, Pennsylvania

Coordinates: 40.1847° N, 79.4656° W