The tower itself is inhabited by several Frostbite Spiders. A lift takes the Dragonborn from the entry to a platform with several more Frostbite Spiders, where an otherwise unreachable Crimson Nirnroot can be found.
A chest can be found behind the spiderwebs adjacent to the lift inside the tower. There are a number of Spider Eggs as well.
At the base of the cliff to the right after exiting the elevator is a Falmer camp with two Falmer. It is possible to carefully work down the cliff above the Falmer tents and shoot both the Falmer ambushing them in complete safety.