Musée Du Louvre | Paris, France

When you think of this Parisian icon, your mind probably immediately goes to the Mona Lisa—but it has so much more to see. Originally built as a fortress in 1190, this must-visit marvel is now the largest art museum in the world, home to 380,000 works, including the Venus de Milo, The Wedding at Cana, and the Winged Victory of Samothrace.