People traveling out on the 40 highway (route 66) passed by the sign for years. The signs read U.S. Gypsum Minning Company, but hardy any ever used the road back in the 50's.
Then one day the sign wasn't there any more. So a couple od Adventurous souls turned out onto the single lane dirt road and drove out to where the town was supposed to be located. What they found was amazing.