The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The underground sanctuary of a mysterious ancient cult.

An alchemist's "magic door" stands in the middle of a Roman park.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A 16th-century horror show built in a lovely Italian garden.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

An ambiguous ambience emanates from this centuries old leprosy quarantine.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

One of the most controversial statues in Romania is an emperor with no clothes.

This 11th-century structure is one of the oldest churches in Romania.

Packed to the ceiling with antique taxidermy and hunting arms.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

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

Something's watching you.

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

A giant portrait of an ancient king looms over the river.

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

A small town Romanian cemetery filled with darkly humorous gravestones.

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

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."