The pantheon feels most special when you get to experience with few people around... There's no lines, but there are people here all the time so it's another one of the places that you might consider checking out early in the day...
I'm not someone who's particularly into bridges but every time I see the Brooklyn Bridge I get chills. It takes about an hour or so to walk across it making it one of the best free attractions in the city.
Stopping at the overlooks on both sides of the bridge is always fun and awe-inspiring! Then, drop down to Sausalito for a nice lunch on the Bay, gelato afterwards, and then onwards with the road trip...
Well, I only want to call in if we happen to be in the area or whatever. It's not on my 'must do' list. I mainly only want to see it because of all the scenes from famous films that were done here. Carlitos Way and The Untouchables being 2 off the top of my head.
i've been told by a guy in work that michael jordans steak house is amazing here. its got a massive window that looks down on the main area while you eat.