One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

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

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

A Nesting Doll of Churches.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The final resting place of the poets Shelley and Keats.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Inside the columbarium, thousands of colorful, high-tech Buddhas guard the ashes of the dead.

This sprawling scenic burial ground is the final resting place of Japan's last shogun.

Once a black market electronics marketplace, now an otaku shopper's paradise.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

A magical place that lets you play in and explore the world of Studio Ghibli.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

A hidden path at the National Theatre lets you look behind the scenes of the latest productions.

The pockmarks across the building's facade are remnants of the Blitz.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.