Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This Transylvanian church has changed its denomination four times.

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

A medieval church built up to defend its village.

Something's watching you.

The Natural History Museum that time forgot.

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

Conspiracy theories and occult legends surround this mysterious natural rock formation.

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

One of the world’s most colorful cemeteries, where each pigment is symbolic.

The unique funeral practices of the Toraja can be seen here with graves carved into caves and hung off cliffs.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Hindu temple of the dead home to hundreds of long-tailed macaques.

A mud brick kasbah with a history of lavishness and traitorship.

An eerie former warehouse turned cistern turned movie set.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

World's largest working waterwheel has been around for over 150 years.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

One of the shortest streets in York has an especially odd name.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Astonishing rock formations dot the Brimham Moor landscape.