Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

The most confusing clock in New York.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

France's most famous cemetery, with some of its most curious tombs.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

The celebrated eyesore created by starry-eyed sweethearts.

In this tiny Iranian town playing on the roof isn't just encouraged, it's the only place to go.

This vast, water-filled underground labyrinth can only be toured by boat.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

17th century mosque for Shah Abbas' harem.