3 types of mines: gold mine, crystal mine and stone\ore mine.
1.01: I made the following: added caves for each mine with animations. Stand Alternate: for gold mine, Stand alternate upgrade first: for crystal mine and Stand alternate upgrade second for ore mine. Work method: You making 2 buildings in Object Editor (For cave and mine) and then you can upgrade cave to mine or build mine on cave (as it works in haunted mine). If there is something wrong in this idea and it cant works properly - tell me and i will retunrn previous version.