If you're afraid of heights, don't drive south on the Pacific Coast Highway. Especially if you're on the passenger (west) side of the car. There are some places that are like one foot of shoulder, no guardrail and what looks like a 200 foot drop down to the ocean. Numbers may be slightly exaggerated, but it sure felt like basically no shoulder (no room for error!) and a straight shot down a high cliff. High enough that you'd have time to think about the fall. I'm sure the views would have been spectacular if I wasn't so terrified the whole time.