Re: USA
Book Alcatraz well in advance. It sells out.
Rent a bike and ride across the Golden Gate Bridge to Sausalito. Get an ice cream and take the ferry back
Drive down to Monterrey and go to the aquarium
Drive down Route 1
Enjoy the Santa Cruz boardwalk at night
Go and look at some of the redwood forests
Check for fires if you're heading to Yosemite.