The Highway of Death, Brazil
This road gets its cheerful moniker from the very adverse weather conditions it often gets. It’s a common occurrence in Brazil to get enormous amounts of rain during the winter and strong, dry heat during the summer. Add in the poor road maintenance and you have a highway with a lot of cracks and potholes.
In addition there are said to be bandits and gangs around every corner who will carjack you, rob you and worse. The sights you will see from the Highway of Death might be amazing but this road definitely entails a fair amount of risk!