There is a place in the black ditch where you can get to using the blink rune, which, as far as I understand, cannot be reached in any other way at the moment. Although this is still a closed place, there are chests and monsters there, plus there is toxic waste, when you run through the water in the pipe, damage is caused. After raising the water level using the lever, you can get there without using a bug through the pipe.
They suggested to me that there is a normal path through the hatch, but I previously thought that it was not active.