As you traverse the lands in Horizon Forbidden West, you’ll run into your second Tallneck in the Shining Wastes that has no apparent way to climb it. Our Horizon Forbidden West Shining Wastes Tallneck guide explains how to climb the Tallneck and reveal the map.
How do I climb the Shining Wastes Tallneck?
If this is your first time seeing the Tallneck, the answer is upsetting: You can’t climb it and reveal this part of the map until later.
You will need to return much later in the game to do so, so you might as well keep trekking on for now. You do return to this Tallneck in the main quest “Wings of the Ten” and you will not be allowed to skip it to beat the game.
Unfortunately, if you want to reveal the Shining Wastes area on the map before this part of the main story, you need just need to run around the area. You can do so relatively quickly by hopping on a overridden Charger mount and riding that around the massive area.