The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

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

This 1920s Dutch barge is now a floating bookstore.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

This massive, 30-foot-tall statue of the famed Scottish knight overlooks a grassy knoll.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

A six-ton wedding present for the King of the Scots.

This early version of the guillotine was used to execute the man responsible for its construction.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

In 1977, an eccentric book lover formed a micronation for book lovers.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

Several land speed world records were shattered at this Welsh beach.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

An outsider art duo's yard has been turned into a whimsical public gallery.

One of the largest private collections of fossils in the world.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

Designed as a reminder of one of the darkest moments in Austrian history.