A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

The only nuclear weapon assembly and disassembly plant in the U.S.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

These half-buried combine harvesters just off Route 66 are an homage to the Cadillac Ranch.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

All that remains of this once-booming mining town are the ruins of a saloon.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.