The Lava Tube/Pitch-Black Grotto is probably where the hole to Maka Wuhu is. The whole mountain was made out of stone so it appears to be man-made. You can access this place in Island Flyover or the last stage of the Cycling Road Race.
Island Flyover Information
- Daytime: “What could have made this massive hole in the side of the volcano?”
- Evening: “Apparently, it wasn’t made by lava at all… It’s man-made!”
- Night: “Archaeologists think this tunnel was built by ancient inhabitants.”