Not all racetracks are created equal. All are dangerous, but some have have particular features that make them especially perilous to the drivers.
Some tracks are known for death and/or seriously violent crashes. Others leave a small margin of error in tight confines. Still others quite simply take the drivers out of their comfort zones, fabricating dangerous situations when they otherwise would not be so.
There a various factors that come into play when determining the level of danger at a specific track: Speed, banking and driver familiarity are probably the most pertinent in the sense of physical danger.
A few tracks on the NASCAR circuit are relatively safe within the context of physical danger. However, there do exist tracks that are so unpredictable that such things as maintaining a "points lead" or "trying to nab a spot in the Chase" can create a dangerous level of uncertainty.
Here are 10 of the most dangerous and notorious tracks on the circuit today.