The fairy tale castle of the "fairy-tale king."

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

France's most famous cemetery, with some of its most curious tombs.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

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

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Gigantic Romanian salt mines used to heal respiratory conditions.

This snug medieval lane is one of the narrowest streets in the world.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.