Not as an actual means of transport (hahahahaha), but just because, well, they're the only moving Historic Landmark in the country. (Wait, why don't we like using them for an actual means of transport again?)
The Land’s End hike has great views, ends at Sutro baths, and it's pretty easy, so you can be like "Oh, I totally went on a hike today," but you didn't have to, like, break a sweat or anything.
Glide Memorial Church
Have you SEEN The Pursuit of Happyness? And that gospel choir. Things get real on Sundays.
Aub Zam Zam
Aub Zam Zam is an unusual bar that Herb Caen once described as "a place that time forgot." But he meant it in a good way. A GREAT way, even. Sure, Bruno, the cantankerous owner who often refused to make drinks for people just 'cause he didn't like the looks of them, has passed on, but it's still a magical place to get an even more magical cocktail.