Cavern 42

 Cavern 42

One dip to the right, and three passages in. One is pretty much a vertical chamber, and the others are normal shafts. Then a series of U-shaped ledges and chambers-with perhaps one exit going to the right. It is 221 feet in vertical height.

The edit is superposed to evoke old CD and DVD record-able media cases and their weird artwork of gradients and neon colors.