n. Woodland that has developed naturally, especially where a suitable climate has developed with it.
the GNU version of the Collaborative International Dictionary of English
n. A wild or unfrequented wood. Also used adjectively.
Word Usage
"The dances in the wildwood are the girl's not-so-secret secret, and it would have been fine for it to remain secret, except that their father, who is in ill-health, must leave their icy valley for warmer climates."