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This cave is very large just by revealing the area, and even Xiao Jin's huge body can easily enter it.

Ye Fan roughly estimated that there were some similarities with the sinkhole where he discovered the Fountain of Youth.

Ye Fan pondered, since Xiao Jin was so eager about something underground, he simply let it go in with him, so that he could know what it was looking for.

"Let's go in first, Xiaojin, you can come in too, this cave is big enough", Ye Fan said.

Jin had been eager to try it for a long time, and it obviously attached more importance to this hole than anyone else.

The group was greatly interested at this moment, after all, Shi Lanyu was from the Gu God Sect, and he was naturally very convinced of the judgment of the guardian god Xiao Jin.

"Giggle...... Brother Ye Fan, do you say that there is any treasure in it, otherwise why would the guardian spirit be so excited", Shi Lanyu said with a pleasant smile.

Ye Fan shrugged his shoulders, "Don't get your hopes up, I once found the Fountain of Immortality in the One Day Pit...... As a result, it didn't work much."

"Fountain of Immortality, have you ever found anything like that?" said Kurohime, surprised.

Ye Fan smiled faintly and said, "Go back and explain slowly."

It is not difficult for a group of people to enter the underground hole, this is not a sinkhole, along the slope, you can go underground.

However, in order to make it easier to investigate, Ye Fan still searched out a few flashlights from the drug lord base.

After entering the cave, Ye Fan thought about it, and asked Xiao Jin to exert great force to directly block the entrance of the cave with stones.

In this way, even if someone came here and thought that the pyramid had been damaged, they would not be able to find out that they had entered the hole in the ground in a short time.

As for going out, there is Xiaojin here, and it's a big deal to open the entrance again.

After following the slope and entering the cave, everyone found that the length of this underground passage was far longer than they imagined.

"Feeling...... It's already at the bottom," the Black Emperor frowned.

Ye Fan stretched out his hand and touched the surrounding stone walls, "The stone walls here, even with the most advanced tunnel excavation tools, can't be so smooth, who made ......it?"

"Could it be an alien?" asked Xu Lingshan curiously.

"Aliens, no one has ever seen them, but if it were ancient martial arts or magic, it would be possible to create such huge stone caves and stone walls," said the Black Emperor.

Ye Fan nodded, he thought of the legendary immortal he had discovered, Shen Xi's family tomb, and this underground passage was just as magical.

Not to mention anything else, his peerless sword intent could also cut through rocks so smoothly.

"I don't know how long it is, we're walking too slowly, we might as well go to Xiao Jin and let Xiao Jin take us forward", Ye Fan said.

Naturally, everyone had no objections, and a group of people went up to Xiao Jin's back.

Xiao Jin also wished to hurry up, and in this huge hole, he began to move forward quickly.

The more you move forward, the more frightening everyone becomes!

"This ...... It's been an hour, isn't it!With the speed of this giant snake, how can it be hundreds of kilometers, how deep is this passage!?"

Ye Fan kept using a flashlight to shine on the stone wall.

On the stone wall, there are occasional murals, intermittent, but it can still be seen that these murals are not ancient civilizations of the same period.

"It seems that this underground passage has gone through an unknown number of years, and there should be a lot of ancient humans who have come in...... They have left their mark here", Ye Fan said.

"Is that a Mayan civilization?" asked Xu Lingshan.

Ye Fan shook his head, "I don't know if the Mayan civilization has entered here, but according to my understanding of some ancient civilizations, there are some civilizations here, which are older than the Mayan civilization!"

"It's older than Maya?Could it be a prehistoric civilization?" Hei Ji snorted and said to the Black Emperor on the side: "Brother, your apprentice, even ancient civilizations have been studied?"

The Black Emperor laughed in a low voice: "He does know more, I let him read a lot of books since he was a child."

Ye Fan didn't care whether Hei Ji believed it or not, anyway, he knew that this cave had an incomparably long history.

Even, some civilizations here are not recorded in the history books of human beings.

"This passage is too long, what kind of civilization would make such a long underground passage?" Xu Lingshan felt incredulous.

Ye Fan remembered something and thought: "I have seen some books before, which record some mysterious underground passages and corridors in the world.

In Morona, for example, there is a probed underground tunnel that is said to be 4,000 kilometers long.

There are also a thousand kilometers of underground corridors in the Andes, in addition to Guatemala, the Altai Mountains, and the bottomless pit in Namibia......

I used to think that these might be some eye-catching articles by archaeologists and scientists, but I didn't confirm them......

Nowadays, the location of this underground passage is a bit like a very famous underground promenade......"

The Black Emperor smiled slightly at this time: "What you said is the underground corridor of Ajarta, right?"

Ye Fan turned around, "Master, did you think of it too?"

The Black Emperor nodded and said, "I was also reminded by you that I remembered this mysterious underground corridor.

It is said that the underground corridor of Ajarta, which connects all the four continents of Europe, Asia, the United States and Africa, has an indigenous tribe and guards an entrance.

However, the information on this underground corridor is very limited, and I have not heard of anyone who has gone in to study it, nor have I found the indigenous tribes......"

"That's right, if this is really the Ajarta Promenade, then it means...... The information is not fake, and it is possible that some people have deliberately hidden this underground corridor", Ye Fan said.

"This corridor should be left by an ancient civilization, but that pyramid ...... Maybe it was built there on purpose just to play cover.

Under normal circumstances, no one would deliberately destroy a pyramid, even a fake Mayan pyramid", said the Black Emperor.

Hei Ji muttered: "You master and apprentice, singing and harmonizing, have said so much, what kind of place is this, what is this snake going to take us to?"

If you walk in like this again, the battery of the flashlight will be exhausted, and it will be pitch black, in case of danger, but the gods can't save it!"

The Black Emperor comforted: "Sister, don't worry, although I don't know where this giant snake is taking us, but there is definitely something amazing, in this underground world."

"You know again?" Kurohime raised an eyebrow.

The Black Emperor smiled and groaned: "You are a black magician, maybe you can't feel it, but I am an ancient martial artist, and since I entered the cave, I have always felt that the concentration of spiritual energy around me is constantly increasing." ”

Ye Fan had no cultivation at this time, and his perception dropped significantly, and when he heard the Black Emperor's words, he pondered: "It seems that ...... Xiao Jin felt that there was a rich aura overflowing from the ground, and it wanted to find the root cause."

As he was talking, there was a fork in the passage ahead, and there were three openings to choose from.

And Xiao Jin didn't hesitate at all, and directly chose the one on the left and continued to move forward.

"How does it know to go here? Could it be by virtue of its perception of aura?" asked Kurohime.

"It should be, this kind of spiritual creature is already more sensitive than us", Black Emperor said.

As time passed, the crowd discovered that the underground corridor was far more complex than their phenomenon.

Sometimes there will be underground rivers flowing by, and sometimes there will be a difference in height and level, hundreds of meters vertically up and down.

It's definitely not just an underground passage, it's more like an underground world.

Occasionally, in the cracks of some passages, there will be some glowing plants, like fireflies underground, and some shining gems.

However, none of these things could make Xiao Jin stay, and Xiao Jin continued to go deeper with his abundant physical strength.

When half a day passed, everyone had already felt numb, fresh, and surprised by the strange scene they saw, which was not as good as before.

However, Ye Fan's eyes were getting brighter and brighter, and a bold idea began to pop up in his mind!

"Do you mean...... Here it is......"

(三七 Chinese.)