A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

This unique Seattle structure was designed to be the greenest commercial building on the planet.

One of the only cooperatively owned bars in the nation wears its eclectic history on its walls.

The timeworn "Yankee Stadium" of the fastest game in the world isn't going anywhere.

Every New Year's Day, locals don gaudy costumes and dive into the frigid Firth of Forth.

These characters from a Robert Louis Stevenson novel stand in an unlikely place.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

The colorful stairs are made with marble from the world's major quarries.

This Arcadian garden in the Pentland Hills boasts over 270 artworks by Scottish artist and poet, Ian Hamilton Finlay.

This 16th-century house tells the city's history through old artifacts and quirky tales.

An American ghost town hides along a side street in Scotland's capital.

Protecting the dead from opportunistic body snatchers.

This stack of stones honors a murdered 18th-century woman.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

Frida Kahlo's childhood home, now a museum of her life and works.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

The only castle in North America to ever house European sovereigns.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

This bell stars in a tragic love tale and is said to make wishes come true.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A statue honors the children who fought Nazis in Poland.