John - Cadillac Ranch is between mile marker 60 & 62 near Bushland (where my brother lives) about 7 miles west of Amarillo. I already made you guys dinner reservations for a Texas sized free steak dinner at the Big Texan:
http://www.roadsideamerica.com/attract/TXAMAsteak.html
Free 72oz steak (if you can eat it all)!!!

Be sure and visit the Texas Tornado Museum

& the top tourist attraction - The Helium Monument.

WOW!!
Lot's a weird & funky stuff in Amarillo.
