Yes, the Mona Lisa is world famous, and that War Museum in some European city gets incredible reviews. But if you're not an art lover or that into history, just don't do them. Much more can be learned by sitting in a beautiful cafe and watching life go by than paying €10 to wander around a modern art exhibition when all you see are splashes of paint on a wall. Your time at a destination will often be short, so do the things that inspire you, not the things you think you're supposed to do.