Every second Saturday in July, thousands gather near Mugs Away Saloon in Laguna Niguel to drop trou, hike skirts, and flash bums at the passing trains in what has become OC's mini version of Mardi Gras, complete with vendors, streakers, and beads. Get tickets ahead of time for the train cars, which get just as crowded as the moon-launch areas -- but slow down to give passengers a better view.
27. Drive the OC-entirety of PCH
Your call on the direction: take it South until it ends at the edge of Nixon's coastal retreat in San Clemente, or start there and cruise North to at least Long Beach (though at that point, why wouldn't you just keep going?). The willfully ignorant will accomplish this in about an hour or so. The rest of us will need the weekend to allow time to stop at all the shops and bars and eateries we never knew existed.