Abandoned railway line circling the city of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

This statue is the only female representation of Rome's "talking statues."

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Gods clash with machines in a power plant regenerated as a museum.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

A private collection of over 30,000 ancient and modern items showcasing the beauty of Islamic calligraphy.

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

The final resting place of one of Hollywood’s most prolific and talented actors is on the grounds of a California Mission.

A master of deception, Harry Houdini's greatest trick may have been living in two places at once.

The silent film master's legacy commemorated in all the right and wrong places.

Celebrating the accomplishments of Black firefighters in Los Angeles.

Instead of hoofing it up steep stairs, residents can hitch a ride on this private lift.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

This Los Angeles animation studio is keeping the wonder of stop motion puppetry alive.

A castle that was built stone by stone by an eccentric journalist.