South (starting building)
Center (cluster of buildings)
Across the ravine with the rope bridge.
After Machine Recon
In and around the crater
Does not register as a quest, but does show up on the map. The last machine leaves a Hijack Boost +6 chip behind, don't forget to pick it up.
Hacking the machines before talking to them or again after you have succeeded once will destroy them.
If talking to them is disabled, make sure to eliminate all enemies in the vicinity. If that doesn't help, reload the area.
You must talk to the machines and then hack them.
After Alien Report
After The Forest Kingdom
Once entered, The Tower can't be exited anymore, making the open world and any incomplete quests unavailable with that character for the rest of the playthrough.
When hacking the tower: