Caves are systems that are available in all Game types. There are several caves around the world that can have openings to the surface or to Hell. Others are hidden in the world and can only be found by mining toward them. Caves are not always endless, finding that most have a dead end.
- Main Article: Cave-in
Cave-ins (a.k.a. earthquakes) can occur where blocks can be released from the cave roof and drop down. Only blocks not placed by the players will drop, and cave-ins will only occur in the area where players are. Cave-ins will not occur when difficulty is on Peaceful Mode.