When you're at Le Mans for the first time, and just hanging around in the area between the Paddock and the Ferris Wheel you don't have (no, you really don't have) a clue of the real dimensions of the Track. 13,5 km sound smaller than they actually are!
So I did a 10 Minutes Helicopter Flight and we flew 1,5 times around the Track. If you're interested in one of those flights for the next time, you can exit the area right behind the starting-grid on the side of the Airport (there's a small brown house where they scan your tickets, so you can exit). I can really recommend this experience to everyone! ;-)