Cadillac Ranch: An Unforgettable Amarillo Experience. Conceived by the San Francisco-based art collective Ant Farm in 1973, the Cadillac Ranch was not merely meant to be admired from afar; it was designed as an interactive, ever-evolving experience, inviting people to leave their mark on these iconic symbols of American automotive history. Over the years, the cars have transformed into a kaleidoscope of self-expression, a canvas for dreams, declarations, and doodles.