Cavern 17

 Cavern 17

This cavern has seven chambers, and one is disconnected from the rest of the passages and shafts. This would likely be the top of a cave, with five shafts down and none going up.

Total vertical height is about 295 feet.

This edit is flipped vertically to be the bottom of a cavern, and has a lot of water (Sumps).

It also has a brave diver and many red fish. 

Red fish is from Elisa Fiore on http://www.publicdomainfiles.com/show_file.php?id=13955401223951