It is a proper sustained spectacle which the French do very well (Paris Dakar, the Tour de France etc) sixty odd teams from all over the world competing with each other over 24 hours of racing.
I haven't been for some time but I went for perhaps 7 years in a row. I was there when Mazda won with a screaming rotary engined car which was great, and when Mercedes brought cars that took off and flew on the fastest part of the circuit the Mulsaane straight, (after the second or third episode of taking off they packed their bags and limped off back to Germany with their tails between their legs), also when Michael Schumacher was a driver in the Mercedes team.
After 22 hours of racing the competitors still have the length of an F1 GP to do before the end.
One oddity is that for a few years the car that was featured on the ticket went on to win. Strange