Digging Up the Past
As the only challenge in this area, you'll need to hunt down and find four Dahl ECHO recordings.
- At the very first encampment, look inside of the only building you can enter. This is before crossing the bridge. It will be on a desk with two safes.
- As you cross the bridge, there will be a building on your left, so go inside of it and out the other doorway, where you'll see the ECHO on the railing.
- When you cross the bridge, you'll see a series of catwalks to your east. On the northern side is a small building you can enter, where you'll find the ECHO on a shelf.
- Climb up to the highest part of the catwalks using the stairs and go to the southern end of the complex, where you'll find a small building you can enter. The ECHO will be on a chair in between the two beds.