Devil's Doorway is what might be called a "ride-through arch" — a group of rocks forming an arch that a rider on horseback can fit through. It's one of a number of such structures on the site of the former Iverson Movie Ranch, but it was by far the most often filmed. It could often be seen in B-Westerns and early TV Western series as an entrance to an outlaws' hideout. The above shot from the Gene Autry movie "Oh Susanna" provides the view of Devil's Doorway as seen from the north.
Devil's Doorway in recent years
This is what it looks like today from the north. Devil's Doorway is now surrounded by condos.
This is the view of Devil's Doorway as it looks today from the south.