Devil's Gate in Supernatural
The Devil's Gate in Wyoming is located in the center of a giant devil's trap, created by railroad tracks, in an old cowboy cemetery. The gate was built by Samuel Colt, the same man who made the demon-killing gun. The Devil's Gate is a gateway to Hell. In forming the devil's trap, Samuel Colt hoped to keep the doors closed and to keep the demons in Hell.

Devil's Gate in Clifton

A legendary subterranean passageway in Passaic, New Jersey that many people believe ultimately leads to the lair of the Devil. The area is a maze of underground tunnels and storm sewers: deep inside, a network of dead trees can be found, each planted exactly three feet apart. According to numerous accounts, dead cats and birds hang from the tree trunks, and an evil spirit guards the passage.