This medieval "painted village" is famous for its geometric facades.

This 11th-century Greek monastery has renowned mosaics and relics of a brutal past.

Remnants of a storybook amusement park hidden behind a strip mall.

Bizarre Cavern.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Palace where the nearly un-killable Rasputin was murdered.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The earliest known map to show America, discovered by accident at a Paris bookshop.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.