Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

A relic from one of London's worst 19th-century slums.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

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