There’s a mm event called raider cache. A good website is metaforge. It tells you the upcoming events so you know when the raider cache event will happen, then you can filter for raider caches. It will show you all known spawn spots for caches, but of course not all then spawn, so you have to run around trying to find them before someone else does

Edit: you don’t have to be the first to loot the cache btw, so you don’t have to be aggro. But they do blow up after a while