The Tour De France Logo in my mind, is quite brilliant. If you don't observe closely, it will seem like a poorly designed logo with some funny font but if you watch it carefully, you will see the beauty of the design (not everyone may agree). The key aspects are described below.
1. The O, U and the R along with the Yellow circle are in the shape of a cyclist riding a cycle.
2. The Yellow circle helps complete the circle but also represents the "Yellow" in the "Yellow Jersey" which is handed to the leader at the end of each day.
If you don't see the cycle in the logo the first time, it may seem like a logo with some clumsy fonts but once you see the cycle, it seems rather brilliant.