Pasadena Freeway (Arroyo Seco Parkway)
The Pasadena Freeway was originally the Arroyo Seco Parkway. It is the first freeway ever built in California (Some argue the United States even.). The freeway gives a nice contrast to the freeways of yesteryear and those of today. Namely, the fact that all the freeway entrances have stop signs, and the offramps have 5 MPH speed limit due to 60°+ turns as well as having multiple sharp turns (Thus the 55 MPH speed limit), making it very dangerous to drive on rainy days. None the less, if you live around the area, its an interesting piece of road that you should at least take 1 drive on.