Shipwreck Beach - Climbing the Tower - Part 2

Once you reach the top of the tower, move forward onto the wooden ledge beneath the zip line but don't slide down yet.

Instead drop down on the right side to land on a ledge with a food cache.

Then go through the doorway into a room containing a relic (4/6), a Toy Train from the Family Outing set. Examine it closely for more info and XP. Ignore the wooden barrier in the other doorway.

Instead step back out onto the ledge where you found the food cache and scramble up the wall to the ledge above.

Then slide down the zip line to the grassy plateau to the northeast. Immediately take cover behind the cement block on the left as 2 enemies walk out onto the ledge above.