Where commuters walk through remnants of an ancient Greek necropolis.

A hot dog stand where the heads are just as hot as the dogs.

Cold war icon and onetime "hole" in the iron curtain.

Towering basalt columns, a creation of fire and ice.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A crucified and bearded female saint.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The ghostly remains of an accidental sea.

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

The Giant Lemon of Lemon Grove.

"We Seceded Where Others Failed."

100 year tradition of fist fights, marked by marble footsteps.

The second oldest continuously operating bar in Louisiana.

The museum chronicling a treasure hunter's dream, fulfilled.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

This historic tower in the California desert promises visitors a "vortex of good vibes".

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Single runway interrupted by a busy road that cuts across its middle.

The site of Paul Revere's historic two lantern warning.

The American rainmaker and a burst dam.

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

Museum preserving torture methods from the past.