A dead saint, a deadly poison, and a mysterious holy ooze.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

A long-buried ancient ruin unearthed right in the middle of the city.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

Now home to a drinking establishment, this building has a macabre history.

Spend the night in this formerly abandoned traditional Scottish village.

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

The highest cold-water geyser in the world.

Scotland still bears an enormous scar of its Roman past.

Legend says this rock was once a chopping block for public executions.

360° views of the city plus five floors of optical illusions and hands-on science.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

These fantastically named natural pools look like something out of a Scottish myth.

A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The last manually operated turntable ferry in the world.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.