Nurburgring Nordschleife (Germany)

The "Green Hell" is 12.9 miles of 73 turns through the Eifel Mountains — the most famous and feared race circuit on Earth. Every automaker uses it as the ultimate benchmark. A lap takes 8-10 minutes for skilled amateurs, under 7 for professionals, and 6:43 for the Porsche 911 GT2 RS MR that holds the road-legal record. On public "Touristenfahrten" days, anyone with a road-legal car and 30 euros can drive it. Blind crests, off-camber corners, and 1,000 feet of elevation change make it the ultimate driving test.