The buildings, structures, and equipment left at abandoned mines are also dangerous. The buildings and structures can be old and unstable. Floors can collapse when they are walked on. Supports can be rusted away. Chemicals, explosives, or electrical equipment and other dangers are sometimes left inside. Don’t explore equipment and structures at abandoned mines.

Underground mines are especially dangerous. They are dark inside, have loose rocks on the walls and roof, and there can be deep shafts and tunnels concealed by rotten wood covers. Underground mines are often used as homes by bats, bears, snakes, and other dangerous animals.