Towers are one of the Diversions in the game, where you must scale a pretty tall tower to get to the top and disable it. To help you with that, there are certain spots set up that you can activate so you can teleport to them should you fall off the tower. If this happens, there’s a platform on the ground at the base of the tower that you use to teleport to one of those points.
There’s only five towers in the game and the good thing about them is that there’s usually a lot of Data Clusters that can be found while scaling them. If you grab all of the clusters on the tower, you will usually get between 20 and 30 of them.