This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Structure built from the skulls of vanquished foes.

A striking symbol of the Bulgarian capital.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

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

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This Romanian village may have been drowned, but it is long from forgotten.

A stunning 18th century pharmacy and medieval chemist's collection.

Something's watching you.

Religious structure known for its sculpted details.

A Romanian church built from one single oak.

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

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

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

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

A muddy alien landscape that is home to rare species of exotic plants.

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).

17th century palace once a meeting place for politicians.