This is something I've been thinking of doing for awhile now... the rocks, the statues, the trees... giving them a secondary tile to use... (especially the trees!)

Basically, we have:

-3 new dungeon entrance faces. one with 3 eyes, one just plain evil, and one evil tree.
-darker, more... torn-up looking bare trees.
-Cross graves
-Cacti
-PINE TREES (what got me started)
-alternate Rocks
-ground-colored steps(interconnects well with...)
-Vertical stairs (rather than viewed sideways, they are viewed going southward, works well with the ground-color steps)

and 2 new dungeon statues.

1: Goron head

2: fallen angel

...that's one sexy little fallen angel statue...

Nintendo made the originals, These are basically an add-on. The necessary pallettes are all on the default Zquest tileset.