>>12174416>>12174422 pretty much what he saidThe entire way we find them is by looking for places they've collapsed so you can see them on SatInt.
They're also annoying as hell to get in and out of. If they open at the top you either have to
1) use a crane, which isn't the easiest thing and severely limits your payload and mobility, not to mention the failure issue - its a lot easier to climb out of a dug-out than a lavatube the size of a cavern.
2) dig your way down, at which point just dig a dug out and safe time and effort.
You also don't need THAT much shielding. You don't need to be under a mountain.
