Road Does Not End sign in west Amarillo, Texas. While the signs are spread out around Amarillo and the surrounding area, Old San Jacinto is the neighborhood where you'll see them in the highest concentration. The ever-enigmatic Marsh explained the signs, saying, "They are to be looked at."

The signs are just there, like the Rock of Gibraltar or the Statue of Liberty. They are a system of unanticipated rewards." Marsh will provide the official-looking diamond-shaped signs to anyone who will put them up on their property. Photo by Kathy Weiser-Alexander.