A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

An alchemist's “magic door” stands in the middle of a Roman park.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A collection of objects supposedly singed by the hands of souls in purgatory.

Breathtaking and huge 430 year old maps of Italy.

A vast city of the dead, where the deceased outnumber the living by more than a million.

A spiritual vortex among the red rocks in Sedona.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

The short oil boom of Venice Beach, and its swift removal from the tourism-laden landscape.

View the California coastline (and the home of Barbara Streisand) inch by inch with stunning, government-sanctioned aerial photography.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

One of only two commuter aerial tramways in the United States.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Oldest building in California still in use.

The restored and active Victorian-era final resting place of San Francisco.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.