Making Ravine

The Making Ravine starts as a crater several hundred feet deep with chasms that spread out from under the floating city of Making. Most of these chasms only spread out for a few thousand yards and stop abruptly into shear walls covered in razor sharp rocks. The largest one however travels for 2-3 miles, is a 200-300 feet wide and has a slow upgrade which reaches the surface of the Glass Plateau. 
At the center of the crater are several rock plateaus, almost steps, leading to a 100 ft wide circle of darkness. Peering into the dark pit no light escapes, no sound reverberates, there is....nothing.