Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An experimental, automotive replica of Stonehenge.

Where commuters walk through remnants of an ancient Greek necropolis.

Large collection from the 3rd millennium BCE.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

An ancient octagonal weather station named for the eight Greek gods of wind.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.