A 1 in 30 chance give or take, where the long range mineral scanner detects an anomaly, has a different icon to the pick axe
you arrive and it looks like this:
(behind the door should obviously be undiscovered)
And when you open it it looks like this:
(add or reduce threats n wealth etc..)
(i don't know how to add a pic then text, so there it is, add wealth but nothing mineable, you know there is good shit inside but do you try to pull it off..? will greed get the better of you..
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That would be pretty cool. The bigger variety of events the better
I like this idea. Would be a good way of adding in new structures, without having to restart in a new world.
I could see this being used for a lot of things, like mechanoid hives, special rare item stashes, or hidden faction bases.