According to a gruesome legend, an architect sacrificed his wife to build this spectacular, 16th-century cathedral.

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

Romania's triumphal arch looks out over Bucharest.

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

Something's watching you.

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

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

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

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

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

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This oddly shaped boulder in Paris is rumored to be cursed.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Located near Cairo's El Korba district, the abandoned mansion continues to inspire mystery and rumor throughout the city.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

An intentionally grounded cargo ship remains half-buried in the sand.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.