This mural, titled The Great Wall of Los Angeles, is one of the most spectacular murals in Los Angeles. It  portrays the history of California from pre-history to now. 

The history is shown from the point of those who were here first, from those who built California, from the working class, from non-Anglos. It was designed and painted primarily by students. working through SPARC. Their Official site has more info.

Located in Valley Glen (formerly North Hollywood) on Coldwater Canyon between Oxnard and Burbank, it stretches for hundreds of yards in a flood control channel. Oddly, most people don't even know it's there.

Each page has several photos, and starts with the most recent history first. 

The site is one of the PoliZeros sites, which includes the PoliZeros weblog and PoliZeros camblog.