Where commuters walk through remnants of an ancient Greek necropolis.

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

Giant marble phalluses on the sacred island of antiquity.

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

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

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

The only road through the heart of Glacier National Park.

New fungal and bacterial species call this deadly lake home.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

An ever-evolving wall of graffiti art off East Liberty Street.

This shallow cave got its name from copious amount of human bones found inside.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”