One of the smallest bookstores on the planet.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

A meteorite-bounded town in Bavaria.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Countless grotesque faces stare out from this eerie Prague art wall.

This artificial cave looks like something out of a fairytale.

The first museum in the world devoted to sexual gadgetry.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Walk through Czech history in Prague's largest graveyard.

Macabre astrological automaton clock dating to the late 1400s.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

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

This bone-filled cave got its name after they found 140 bear skeletons inside.

Something's watching you.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

The romantic botanic tunnel feels like a well-kept secret.

No one knows who built this strange cave of worship or exactly why.

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

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

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.