Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

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

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The underground sanctuary of a mysterious ancient cult.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

A vast array of tropical plants collected by a vacationing couple.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Megachurch turned Catholic church comprised of 10,000 glass panes.

The hidden jewel of Disneyland: a members only playground for the Disney elite.

Oldest building in California still in use.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

A popular tourist cave with a dark past.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Quite simply the largest tree in the world (by volume).

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The history and future of cannabis.

Amsterdam's Red Light District leaves little to the imagination.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".