There's a modest zoo in the Jardin des Plantes, but without a doubt, the best zoo is here on the southeastern outskirts of Paris, quickly reachable by Métro. Many of this modern zoo's animals, which seem happy and are playful, live in settings similar to their natural habitats, hemmed in by rock barriers, not bars or cages. You'll never see an animal in a cage too small for it. The lion has an entire veldt to himself, and you can lock eyes comfortably across a deep protective moat. On a cement mountain like Disneyland's Matterhorn, exotic breeds of mountain goats and sheep leap from ledge to ledge or pose gracefully for hours watching the penguins in their pools at the mountain's foot. Keep well back from the bear pools or you might get wet.