Like the wide variety of stuff around the mine there are also tunnels. Tunnels are said to be the mystery and the biggest labyrinths of everything around. Tunnels unlike caves aren't so overcrowded but also are divided into light and dark.
Light tunnels are tunnels which are lighted by lamps while dark are those that have no light and are places where no one has ventured yet. Miner's legend speak that at the end of some tunnel there was the Miner's Treasure. A myth or Truth ? It's your choice. Many have seeked to find it but all were lost so no one decided to look for their own adventure in the dark tunnels.
Every tunnel leads to something was it a dead end or another world or did you just inflitrate another village withour your knowing. You can never know. It's your choice to journey into this maze but getting lost and not surviving is common and often.