The Woodland Tower stands near an abandoned military camp. Remnants of camp structures can still be seen, along with monsters who now call this place home. Similar to the Lanayru and Ridgeland Towers, you will have to weave around a lot of enemies if you want to get by unnoticed, or you can fight your way through for a clear climb.
The easiest way to ascend this Tower is to use Revali's Gale (again). This lets you simply fly over the monsters and clear half the Tower, leaving you a much shorter climb.