I recently drove cross-country, passing through the Texas panhandle, which gave me the opportunity to have a look at Cadillac Ranch outside of Amarillo. Plopped down in the middle of a field just south of I-40, Cadiallc Ranch was commissioned by eccentric rich guy Stanley Marsh III and built by artist/architect collective Ant Farm. The sculpture consists of 10 50s-era Cadillacs half-buried nose-down, and covered with a riotously-colored palimpsest of graffiti, which is encouraged.

Cadillac R...