The Cave Obby is a three stage obby that rewards you with 4,000 coins upon completion. The three stages are:
Entrance to the cave
First stage: several jumps across lava.
The first stage
Second stage: a broken bridge you must jump across.
The second stage
Third stage: an ice slide with swinging, spiked logs you must avoid.
The third stage
Once you complete the obby, you are greeted with a chest that rewards you with 4,000 coins and you are teleported back to the entrance of the obby.
The end of the obby