i have always loved maps & atlases of all sorts; one of the few good memories of my earlier schooling is the elaborately decorated maps i made for my Texas history class--i colored each of the counties in a different pattern--& did it differently every time.
i especially like atlases published between 1922 & 1943 that show the country of Tannu Tuva, famed for its throat-singing.
historical atlases--from classical times, ktp. these explain a lot about current events, actually (e.g. the Ottoman Empire)...
i even like imaginary maps. for instance, i treasure a book from the early 70's that predicted California would fall into the ocean--& printed a helpful chart of what the new coastline would look like.
also images of the earth after the polar caps melt. i think about this one a lot.
i have made my own maps in a limited way (the underground tunnel system downtown, a creek near my house).
sometimes i think of all my other work as map-making, only in places you can't walk.