The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

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 first ‘Harry Potter’ film.