Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A diminutive statue that was inspired by the sculptor's own daughter.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A spherical "micro-nation" in the heart of Vienna.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

Come for the springs; stay for the mud bath.

This 1930s-era Route 66 Tulsa landmark was moved, restored, and filled with neon.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A mechanized clock where a man fights off a dragon, crab, and rooster.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This massive library holds what was once the largest book collection in the world.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A unique interactive experience of everyday life in communist Yugoslavia—a very different time in Croatian history.

Bridge that died in war and was resurected.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A marvel of Byzantine engineering under the streets of Istanbul.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

Ancient serpentine sacrifice holder that has stood the test of time.