The first main area in Horizon Forbidden West has six Signal Towers that Aloy can climb and salvage Signal Lenses from. They have no purpose until you deal with them Signals of the Sun mission. Then you know that there is an NPC that will pay them well. This guide covers the location of every Signal Tower, so you know how to collect them all.
Lens of the morning
Lens of Morning is located in a destroyed tower at the top of this area. Raise on the map close to where you first entered. See above for map reference for Lens of Morning.
Lens of Dawn
Lens of Dawn also ranks first in the game’s first main area. It is located to the left of the main road before you reach the river. See above for map reference for Lens of Dawn.
Lens of Midday is located in a tower near Chainscrape. Cross the river and lean slightly to the left, and you’ll soon meet it. See above for map reference for Lens of Noon.
Lens of the afternoon
You can’t reach the Signal Tower, where the Afternoon Lens is located, until you do the Twilight Path quest. To do this, you first need to complete the quest The Bristlebacks and clear the valley of Bristlebacks. Then you can go up the mountain to meet a priest who has seen better days. You’ll need to scale the tower for a machine part, and at the top of the tower you’ll find the Afternoon Lens buried in some rubble, not attached to the satellite dish. See above for map reference for Afternoon Lens.
Evening Lens is another Lens associated with a mission. This is part of the Sun’s Signals mission. This is a quest you can get when you are near the entrance to the Western Forbidden. A woman on a high cliff needs help after her guide falls to his death. She will tell you about the Lens and after you get it she will buy it all for you for a reasonable price. See above for map reference for Evening Lens.
Twilight’s lens is on the road from the Hunting Grounds in this region. Once you’ve completed the Sun’s Signal questline, it will appear on your map so you can go straight there. See above for map reference for Lens of Twilight.
https://www.gamepur.com/guides/all-signal-tower-locations-in-horizon-forbidden-west All signal tower locations in Horizon Forbidden West