Generally I avoid cell towers for 2 reasons. They are not very interesting to film them and they can make some troubles.
Flying in ATTI is really no problem, particular if there is no wind. If there is and you fly near any structure, the crash is only a few seconds away. Usually it surprise you and take just enough time till you realize that the drone is drifting that there is too late.
It happened to me two weeks ago, when I was in ATTI testing the speed and the direction of the wind, which was pretty strong but not so that Phantom can't handle it easily. I had the Phantom 10 m above my head when I looked at the display for only two seconds and just at that moment the wind changed the direction and when I realize that the drone was going to hit the church only 20m away it was too late already to do anything. Such things happened very quickly so the best way to handle ATTI is having enough altitude. to fly over near objects.
I felt very stupid and angry after the crash, not because of the damage but because of my self-confidence in drone flying.