This hunter-gatherer architecture is believed to be the oldest religious complex known.

This famous city eluded concrete detection until the early 2000's.

A former reservoir that was only recently discovered after more than 60 years of disuse.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

Architectureal fantasy quarter of Rome.

A spectacular cave and a beguiling lake.

A little-known park with unusual, half-ruined structures and a mystical energy.

A two thousand year old brothel uncovered in Northern Greece.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Miraculous tree that seems to sprout out of solid rock.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

This famous archeological mystery may be an ancient example of movable type.

Only open for two days a year, this church links ancient Greek and modern Christian celebrations.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.