Minecraft wiki entry for Player_versus_Player, associated text: An items stash is a small (no more than 4x4x2), completely camouflaged room with a few double chests loaded with equipment. Because they rely on not being detected, their locations should be only known to trusted members. The ideal location to build one is underground but in a location where no-body would dig. For example, near but not in a surface cave since the player trying to mine would just go down the cave.