Exclusive to: Hamlet.
Upon entering a Cave Cleft, the player will find some structures such as Stalagmites and Unimportant Pillars which can be mined with a Pickaxe or Opulent Pickaxe. One can also find some Fern on the ground, and sometimes Flint. At the center of the room, a Spooky Hole will be found.
Only one Cave Cleft per world will lead to another area. After the player is flown to the fourth island by the BFB, the cave entrance from that island will lead to an exit blocked by a Stone Plug. Mining this Plug will unlock the exit, which leads to a random Cave Cleft on any of the other 4 islands. This entrance does not have to be re-mined in order to travel through it again.
It is possible to find one or more Vampire Bat(s) sleeping inside. They will remain asleep unless intentionally woken up either by attacking it or from being hit with debris from a cave-in.
While inside a Cave Cleft, the character loses no Sanity because of the darkness.
- Dying in a different world (any of the three DLC realms, as well as caves, ruins, and the volcano) and respawning from a Meat Effigy or Magic Flower that was placed inside any Hamlet DLC interior (Slanty Shanty etc.) will cause the player to be respawned out in the void of the world holding the respawn structure. It is recommended to use the command c_warp("prefab") to teleport the character back into the world, as walking back in can be problematic for world types such as Shipwrecked.
- It is advised to visit these caves in the very early stages of the game to obtain Gold Nuggets to build a Science Machine or Alchemy Engine.