Relic 1 (Stamp)
The box is by the campfire in Weather Station.
Relic 2 (Reliquary Pendant)
Walk around the building past the helipad, in front of the weather station - the chest is at the other side. Examine the engraving at the back of the pendulum.
Relic 3 (Engraved casing)
On the platform, over which you enter the weather station. Examine the engraving.
On the left side of the gate, by the forest exit.