Even in heavily built up Orange County, there can still be places where old highways can be seen. One of the best examples is located in Brea Canyon, where the Orange Freeway winds its way through open and undeveloped lands between Orange and Los Angeles Counties. Before the freeway, State 57 followed Brea Canyon Road. This two-lane roadway has changed little through here and has a few interesting features.
Northbound video from Lambert Road to Diamond Bar: