iKangaroo: Don't be afraid of the line, it moves quickly. Highly recommend going up in the bell towers to see the gargoyles and for one of Paris' best views.
1 rue de la Légion d'Honneur (Quai Anatole France), Paris, Île-de-France
Art Museum · 829 tips and reviews
Matt Healy: My favorite museum in Paris. Great impressionist and post-impressionist collection, and you can see the whole thing in a day without breaking a sweat.
Science Museum · Jardin des Plantes · 28 tips and reviews
Joanna Flamm: A must-see for people looking to see the less-touristy side of Paris. Two giant rooms full of animal skeletons, from frogs to whales to dinosaurs. My favorite was the narwhal.