Błędnie: You're going to love our cottage in the forest. Well, the forest itself is tiny, but still you can take a nice walk there. Poprawnie: You're going to love our cottage in the wood. Well, the wood itself is tiny, but still you can take a nice walk there.
"Forest" to 'las', (duży obszar leśny). "Wood" lub "the woods" to raczej 'lasek' (także 'drewno') niż 'las'.