There aren't too many operational funiculars around, but Pittsburgh has two!

Deep scars on the earth left by the Ice Age.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Landmark dedicated to the plight of the American Indian in the 21st century.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Famously misunderstood wonder of the ancient world

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

This bridge was constructed from the rubble of the infamous Bastille.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The very center of Paris is surrounded by a bevy of strange good luck rituals.