Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

A Nesting Doll of Churches.

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

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Architectural monsters are devouring this palace's every door and window.

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

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectureal fantasy quarter of Rome.

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

The mystic whose incorrupt corpse still attracts the faithful.

Vintage furniture and art share space with all manner of collectibles at this quirky shop in Bangkok.

Time-frozen department store of dangerous and dusty relics.

A historical convent known for taking in bad luck babies left on its doorstep is now an upscale shopping center.

The busy transport hub is home to the tallest airport slide in the world.

This jam-packed Singapore antique museum preserves the fading remnants of a uniquely mixed culture.

One of the largest Chinese cemeteries outside of China spent years overgrown and forgotten.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

Buddha shrines hide within dark tunnels at this unique forest temple.

Abandoned mini-mansions that were once intended for affluent Bangkok families now sit empty.