Wu Yu could not resist a closer look.

Of course, the closer he got, the more realistic this skull looked. Although it was pitch-black, like ink, the bone definitions were basically the same as an ordinary skull's. It did not look like it was carved or forged, but rather a natural object. 

The Bloody Yan Cave was about the same size as the Immortal City of Northern Frost, while the Flaming Devil Cave was about 10 times the size of the Bloody Yan Cave, and was close to the scale of the Dark North Capital. This huge skull castle was a disconcerting sight for Wu Yu.

There were many strange and fascinating places in the world, many more than Wu Yu had imagined.

The Taigu Immortal Path, the Alternate World, the Infernal Inferno, etc. These places were probably plentiful throughout the Jambu Realm, as well as the legacies of ancient martial cultivators, the treasure hoards of vanquished nations of history. From the records, many had yet to be rediscovered.

Although this Flaming Devil Cave was quite fascinating, from his experience...