You can find the Mapping Cave Systems book in the box in the back room of the Adventurers Guild, after defeating 1000 monsters. You can also buy the Mapping Cave Systems book from the Bookseller ...

🌍 Sơn Đoòng Cave, the largest cave system on the planet ... s why 'The universe has thrown us a curveball': Largest-ever map of space reveals we might have gotten dark energy totally ...

No one knows how big the underside is. More than 365 miles of the five-level cave system have been mapped, and new caves are continually being discovered. Two layers of stone underlie Mammoth's ...