Old Town Orange

Old Town Orange is essentially the beginning of Orange County, and it's heart. Most of the buildings were built between 1888 and 1940, making it one of the older cities in California. For this reason movies such as Fallen Angel, Gumball Rally, Gentleman's Club, Big Mama's House, That Thing You Do, Adventures of Rocky and Bullwinkle, The Last Dance, and more have all had scenes in or around the Orange Circle in Old Town Orange.

When in the area, Old Town Orange is a great place to visit, it has some great food including Felix's Cafe (Cuban food) and Watson's Drug & Soda (good for a sandwich at lunch).  Old Town Orange is also known for its shopping, mainly Antique shops, if that's what you're in to.  By night the area changes over and becomes an active bar zone, with bars such as District Lounge, Pauls, and O'haras.

Knott's Scary Farm Halloween Haunt - Buena Park, CA

Knott's Scary Farm is a well known event for any kid growing up in Orange County.  Every year they transform the Knott's Berry Farm theme park into a haunted theme park, with monsters running through the park scaring people, haunted mazes, and special twists to many of the rides.  The park has pretty good rides to begin with, so add in the special event around Halloween, and it makes for sell out crowds, and very long lines.  That being said, there's not much you can do to avoid them if you want to see Knott's Scary Farm, so you may as well just go for it.