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Stanley Marsh 3, the eccentric millionaire, artist and prankster of Amarillo, Texas, has passed away.

Although he was best known for his commissioning of the world-famous roadside attraction Cadillac Ranch, Marsh was responsible for multiple unusual projects around Amarillo, including "Floating Mesa" — a landform painted to look as though its top were suspended in midair — and a series of fake road signs bearing phrases like "Road Does Not End" and "Steal This Sign."

Marsh died yesterday at the age of 76. This Saturday marks the 40th anniversary of Cadillac Ranch.