Master the 'Ring (Nürburg, Germany)
Credit: Karl Johaentges / Getty Images

There are 73 bends on Germany's Nürburgring Nordschleife, and every one of them is life-threatening. The track was deemed too dangerous for Grand Prix racing, yet today any shmuck with a working automobile and 33 euros can drive the scariest, most challenging 12.9 paved miles in the world. The blind, roiling Flugplatz sends you skyward without warning, realigning your internal organs, blurring your vision, and soiling your undergarments. The steeply banked 270-degree Karussel spins you like a merry-go-round. Carve through the Wipperman esses wrong and you'll be picking tree parts out of your skull. The 'Ring allows no margin of error, no time to breathe, no time to think. No time to do anything but hang on and try to not die. [nuerburgring.de]