Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Breathtaking and huge 430 year old maps of Italy.

Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The footprint of a frustrated devil in Munich's Cathedral.

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

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Elevated freight railway turned wildly successful urban park.