There have been many reported sightings, including many UFO reports along this highway. The infamous area 51, along with multiple other military bases runs along this parallel. Chuck, who is a UFO and cow mutilation investigator, will throw everything he's got at this one to try to get some answers.
There are many theories about the 37th parallel, but none claim solid proof of paranormal activity. To see one theory please click here. That should be a good read to get you in the mood to watch this.
The Unexplained Files airs Tuesdays at 10 PM EST/PST on Science Channel.