Now home to a drinking establishment, this building has a macabre history.

A sweet symbol marks the place where torturous executions were once carried out.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Likely the world’s only place where you’re meant to skate on top of cars.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A contemporary fresco movement illustrates the region's rich history.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A Beaux-Arts architectural surprise and a charming nostalgic tour through northern Mexico’s railway revolution.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This city's cultural center is in a restored Spanish colonial home from the 1800s.

This series of paintings celebrate a locally beloved snail species.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A bronze statue of the famed Prussian naturalist commemorates the year he spent in Mexico.

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

This museum houses two of Mexico's most impressive Aztec monoliths.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

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

Its incredible collections are dedicated to preserving Mexico's film history.

This mid-century mural portrays humankind's spiritual and scientific journey.