LOL Fanof5...I would say Canada. Europe has a liking for Rally and the Indy cars. O wait Canada Is too cold. So I guess they would have to take their chance out in Europe.
They could just lay out a really big dirt track near any southern desert city. The locals would go nuts, and the drivers could all complain about the dust and the heat and those lousy butterfly bombs and land mines that keep blowing their tires out when they run over them.