The commemorative stone column conceals a secret laboratory.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

These Victorian era devil sculptures were designed to spite a local vicar.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Artists and musicians now rule over this former rail station.

A building that survived WWII, possibly on the virtue of its name alone.

Preserved behind glass, the ruins of a medieval building used to store human remains.

This pub boasts a curious history and may have inspired a Dickens character.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

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

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

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

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This curious, round temple is the oldest still-standing marble building in Rome.