Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

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

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

A striking 12th-century-style castle built on the edge of a cliff.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

A museum and shop on Bourbon Street located in the French Quarter.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The celebrated eyesore created by starry-eyed sweethearts.

Less a museum than a bizarre fantasy world created by artists and engineers.

Curious cave that stays a cool 56 degrees all year long.

A modern day curiosity cabinet.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Resting place of Hollywood's immortals is also site of summer film screenings.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.