Well, one's underwater, so that will take some tinkering. As for the others, one's in the ruins of Lunare, so expect a lot of walking through tunnels to get to it.

The other... well, it's deep in the quarantine zone around Hyperion. Likely to be a suicide run, according to Leah. That said, they need to be cleared out somehow, and we have advantages her people don't.

[Namely, the ability to die twice in the process.]