Amarillo is a city in the Texas Panhandle. It’s a gateway to the vast, trail-lined Palo Duro Canyon State Park. The Cadillac Ranch is an installation of graffiti-decorated cars, partly buried in a field. With art deco and Spanish Revival buildings, the U.S. Route 66–Sixth Street Historic District is a hub for dining and antiques. The American Quarter Horse Hall of Fame & Museum is dedicated to the famous horse breed.