Pretty much any kind of "touring/sightseeing" is going to require a car, as you know So.Cal. is huge and spread out. Drive down the Ventura Freeway (101) and take Malibu Canyon Rd. through the hills to Malibu. Cruise Pacific Coast Highway up or down- see Malibu colony (town), Santa Monica pier, Point Dume beach, etc. Have an absolutely great fish dinner at "Duke's", complete with strolling Hawaiian musicians with 8-string ukes. Drive inland from Oxnard through Ojai and Carpinteria on a smaller highway to see just a taste of California's fruit and vegetable growing fields. Go all the way in on the 101 Frwy. to Hollywood- cruise Sunset Blvd. and Hollywood Blvd., checking the typical tourist stops like Grauman's Chinese Theater, etc. Go down La Brea Ave. and have a hot dog at the legendary "Pink's Hot Dogs". If you want a serious meal, find "Off Vine", located in the back yard of the Cinerama Dome theater. Go down to Wilshire Blvd. and find the LA County Museum of Art, where they currently have a fantastic exhibit of John Singer Sargent paintings. Also on Wilshire is the Peterson museum with lots of classic cars and motorcycles, if you're a car nut like me. If you go west on Sunset Blvd. beyond the town of Hollywood you'll see all the fancy shmancy Beverly Hills homes, pass by UCLA, travel through Pacific Palisades, and end up on PCH in Santa Monica. Traveling all the way up PCH back to Port Hueneme could be a fun drive, too. There's lots more here, I've just got to go back to work now. You'll have a good time.