Here are some pretty pictures I found of trees in full color.
fondo de pantalla
fall
autumn
trees
leaves
country
paths
woods
forest
This Autumn fondo de pantalla contains
valla, palideciendo, valla de piquete, cerca de piquete, palidez, cerca de carril, valla de ferrocarril, carril guía, empalizada, and palizada.
There might also be
cerca de alambre and vallado enrejada.