I'll be an 18 years old next summer, and I will be traveling through Western Europe. It will be my second time in Europe, and I know French fairly well. I want to go from the area around Nice, France to Crans-Montana, Switzerland. What are some good ways of going from one to the other, but I'm not sure of means of travel besides train. Also, what are the requirements for an American to rent and drive a car in Europe.