Originally posted by DoubtQning:

2 Days ago (rl) i found a mine and got all the loot etc from it, i found it again and i saw, that the yello lightning mushrooms are already respawned (or growed again)but all the doors are still open and there is nothing to find anymore.. Sorry to damage your brain with my bad englisch, i hope for some help. Thanks alot.

I know, bad english. But they are not "mines". They are crypts. And once you clear them they are done unless you do not destroy the skeleton spawner. All the loot with the exception of the mushrooms (and spawner skeletons) will not respawn once removed. I would not worry about it as there are a LOT of cyrpts in the world and they are easy to find if you just search new Black Forrest areas.