Nine centuries-old fortresses guard the walls of this medieval Romanian city.

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

This 1920s Dutch barge is now a floating bookstore.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

Public access to clean drinking water was an instant hit among the masses.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The television series' iconic giant foot was borrowed from this classical painting.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

London's smallest police station is barely the size of a phone booth.

A hands-off space for graffiti artists to hone and display their skills.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Banksy gives themself artistic license with this piece of London street art.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

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

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

Scattered throughout London are ancient remnants of the city's former bounding wall.

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.

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

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.