Perhaps once per term, the President can name a landmark, and in the Senates term, they can vote to name a landmark as well?

CivIV adds the ability to "tag" game tiles... why not use it for role play and such?

I think it could add something to the game. We might have to have some rule about not having too many in a certain area, as we don't want to completely clutter up screenshots, but if done correctly, I think it would work nicely.