If you're planning a trip to Europe, visiting some of the continent's many art museums is a necessity. There's nothing more rewarding than absorbing the places where many of the world's best art is on exhibit. Cheap flights and trains make travel easy; don't limit yourself to one place.
The Louvre - Paris, France
Vatican City - Rome, Italy
Van Gogh Museum - Amsterdam, Netherlands
The sheer amount of art throughout Europe is truly amazing, and it's something that everyone needs to experience at least once in a lifetime. Even if you don't fancy yourself an art lover, seeing something in the flesh that you've only seen in pictures is something shouldn't be overlooked.