The original "capsule building" is a masterpiece of Metabolist architecture.

Unbeknownst to most passersby, this marble statue standing outside an office building is a genuine piece of second-century Rome.

This Japanese Manneken Pis gets new outfits for every occasion.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.