Hire bikes and cycle over golden gate bridge
Go to Angel island and hire bikes to get amazing views
Muir wood
Monterey aqua marine park & carmel
17 mile drive near carmel
Get to Yosemite if you have a couple of days spare and hire a car
Actually a massive land slide on route 1 (Big Sur as you say). Need to cut inland but still can get loads of route near Carmel. Visit Cypress Point and Pebble Beach golf courses as well...Might be biased...