If you're in Vancouver, you can't leave without experiencing the Sea to Sky Highway. Take a trip up to Whistler for the day and surround yourself with stunning mountains and some of the most beautiful scenery on earth. Stop by the Southside Diner in Whistler, or pull over and go to Shannon Falls. Or just roll your windows down (in the summer) and enjoy what's around you.
Car rental aren't ridiculously expensive or join a tour group.