A wartime promise becomes a shrine to Our Lady of Lourdes.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

World's largest collection of serial killer artwork and other macabre exhibits.

World-famous, Pink's still manages to keep its prized cult fetish status.

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 most confusing clock in New York.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Breathtaking and huge 430 year old maps of Italy.

Hear the quietest sound from across the dome.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

France's most famous cemetery, with some of its most curious tombs.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The "lovely red Vega" of the legendary record-settling pilot.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.