If you thought racing cars only involved driving around a loop repetitively, think again. Many of the world’s top car and motorcycle races involve difficult terrain, extreme conditions and incredible endurance. Race car drivers from around the globe test themselves in some of the most inhospitable environments—pushing their vehicle, and themselves, to the limit in the process. These are races that are truly grueling and have to be seen to be believed. Here is a list of the 10 most extreme car and motorcycle races in the world today.