Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Gargantuan home of Russian science.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

A historic arboretum and non-conformist, non-denominational park cemetery.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A close look reveals that the Scottish monument is just slightly off-kilter.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.