Fantastic Maps: Tree Bridge, is a very specific map, that of a massive tree bridge that runs between a series of four waterfalls. It includes an overview image that also includes an illustrated view of what the overall effect is. This is a very specific maps and probably only has a few utilities to it, but this is not a bad thing. For example, Paizo has a series of map products that are not tiles but flip mats and these are non-changable. They are useful for their primary purpose and for revisiting that local.
In this instance, I could easily see this tree bridge belonging to an eladrin outpost that leads to the Fey Realms and the first use would be the players encountering the fey and the second the players encountering something worse than the fey.
As far as the tiles, the 62 page product, very low priced at $1.35, includes full color tiles as well as gray scale tiles. For the price, the tiles can't be beat.