7 Infamous Highways in America "20/20" took a drive on some of the country's most dangerous, infamous highways. Get the full story on "20/20" Friday, Aug. 23. Kicking off a few of the ones "20/20" profiled is The Snake in California: Driving enthusiasts flock to this swerving stretch of road on California's Mulholland Highway. Hairpin turns, inexperienced drivers and speeding cyclists add to the danger and thrill of The Snake.