Talk:Sinkhole/@comment-71.46.226.132-20150828052705

Spawning a cave entrance on the surface will always take you to a new cave, even if you have already entered three of them.

Spawning a cave entrance in the caves takes you to the ruins, but all ruins entrances in a particular cave lead to the same instance of the ruins (One cave can only lead to one ruins). The ruins exit is always the cave's earliest spawned sinkhole that has been used.

Spawning a sinkhole in the ruins (2nd layer) takes you to a new cave generated in the same style as the 1st cave layer, making a 3rd cave layer. All sinkholes spawned in a particular ruins lead to the same 3rd layer (One ruins can only lead to one additional 3rd layer).

The 1st and 3rd layers are identical in that they both exit to the same sinkhole on the surface, and spelunking deeper in both leads to the same instance of the ruins, however the only way to get to the 3rd layer is by spelunking deeper in the ruins.