Survival Caches | Research Base Rise of the Tomb Raider Guide
Survival cache 1
By the lake with a small waterfall, go left where you need to take the path between rocks. Walk to the end of the road.
Survival cache 2
In the forest, past the skating rink, close to the vehicles at the edge, at the tree.
Survival cache 3
A it past the tree, which is opened the next time you are here (it is also possible to reach it from the direction of the other side of the forest).