What's this building? (hint: it's not a trick question) Peter Haas / Wikimedia Commons / CC BY-SA 3.0 It's Notre-Dame-de-Paris, one of the two cathedrals of Paris. A cathedral has…

You might come across one of these, in the sidewalk. What do you think this is? (hint: it's a seafruit) It's a scallop! It's on the path of the pilgrimage…

What city is this? (hint: it's a trick question): NASA London, England, United Kingdom. See how it's green? This one's easy: Paris, France. See how it's dense? It's four times…

There are two rivers in Paris: one overground and one underground The Seine Photo: Dietmar Rabich / Wikimedia Commons / “Paris, Seine -- 2014 -- 1321” / CC BY-SA 4.0 The Bièvre. It was over the ground until…

This one's easy: France since 1794, during the French Revolution (1789-1799). It has changed a little since back then. It's commonly referred to as "the three-colour flag" (le drapeau tricolore)…