Mines are adventure map locations, that can be flagged after which they will start to produce a particular resource for the player who owns the mine. There are eight different types of of mines. At the beginning of each day, a sawmill will produce 2 wood (), an ore pit will produce 2 ore (), a crystal cavern will produce 1 crystal (), a gem pond will produce 1 gem (), an alchemist's lab will produce 1 mercury (), a sulfur dune will produce 1 sulfur () and a gold mine will produce 1000 gold (). Abandoned mine works as any other mine, but its production is randomly chosen at the beginning of the map, and it cannot produce wood. Additionally, the map maker can choose between the resources the lottery is made or he can set it always to produce certain resource.
Mines can have creatures stationed in them in a similar way to garrisons. This feature was added in Shadow of Death expansion. Regardless of where the mine is placed, any combat taking place in it will use subterranean terrain for graphics and when determining native terrain bonuses.