The HOLLOW LOGS look like they're in a fairly open clearing, and are just what they sound like- hollowed out logs spread out in a what looked like an organic playground. Primus could only imagine what a day spent playing in it would be like, or even turning it into another base! There's probably goodies to be found as well, and he notes that it'd be a worthwhile trip at some point if the void wanted them to pick up some more natural materials.