The cubicle I selected for my self in our Toronto office has a big tree growing out of it. It's the only one that does. If you look up over the cubicle walls as you're walking through the office, it looks like a weird oasis of green in a sea of... well, cubicles.
I can't take any credit at all for this. I didn't choose the cubicle because it had a plant. In fact, it was was so piled with random junk before I moved in that I didn't actually discover the tree until after I had removed the random junk.
Still, I like my tree.