It would be easy to assume that Paris might be a city trapped in its architectural past. Its global brand is most often associated with the work of Haussmann from the 19th century. The city itself is almost entirely devoid of modern skyscrapers. And heritage preservation rules are, from what I gather, strict. But look behind and beyond Haussmann's facades, and you'll find a city that is progressive and experimental.

Take, for example, the Bourse de Commerce. Originally constructed in the 18th century as a hall to both store and sell wheat, a recent renovation by Japanese architect Tadao Ando dropped an exposed concrete cylinder right in the middle of it. It is now a contemporary art museum and, in my opinion, one of the most architecturally interesting buildings in the city.

Paris certainly cares about its past — as it should — but it's also not afraid to intervene and break free from it in dramatic ways.