Clinton County Army Air Field, Kentucky

While Clinton County Army Air Field lacks traditional archaeological significance, the site holds important historical value as a military installation and the location of one of America's most documented early UFO incidents. The original airfield infrastructure, constructed in the early 1940s, followed standard Army Air Forces design specifications with concrete runways and support buildings typical of wartime training facilities.

The Mantell incident of January 7, 1948, transformed this relatively obscure former military site into a landmark in UFO research. Captain Thomas F. Mantell Jr., a Kentucky Air National Guard pilot, was scrambled along with other P-51 Mustang fighters to investigate reports of a large, circular object in the sky. Radio transcripts document Mantell's pursuit of the object to dangerous altitudes before his aircraft broke apart, killing the experienced pilot.

Official investigations by the U.S. Air Force initially classified the object as Venus or a weather balloon, though later analysis suggested Mantell may have been chasing a classified Skyhook balloon. The incident prompted the establishment of Project Blue Book, the Air Force's systematic investigation into UFO reports that would operate from 1952 to 1969.

The site's location along the 37th parallel north has attracted renewed attention from UFO researchers who claim this latitude experiences statistically higher numbers of unexplained aerial phenomena. However, no peer-reviewed studies have confirmed unusual activity patterns specific to this geographic coordinate, leaving the 'UFO superhighway' theory as speculation rather than established fact.