Downtown LA Walking Tour

Great maps and pictures:

"This map-based site contains hundreds of images of downtown Los Angeles, displaying its tremendous architectural, cultural and economic diversity. There are seven sub-regions, accessible either through the map or the list on the left bar. Each sub-region features specific sites of interest, whether architectural, cultural or economic."

I know you can take the Metro to Union Station which might be a good starting place. I've taken the train to LA and found the station to be a treat in itself. It's the sort of place that use for weddings and events.