What are some example of the biggest material caches you've found, some that might be unusually stacked? I found a ton of ionized and compressed liquid gas today at one settlement (one building actually).
This graphene was interesting. This settlement was loaded with it for some reason.
If you trade with a settlement (eg loading a carrier) I find the place is loaded with weapon components, graphene and microelectrodes.
Military settlements are frequently loaded with graphene.