Li Fan thought back to the last thing he remembered before he lost consciousness, and then reacted, wondering: "Could this be an underground ruin!"

John looked back and asked, "What did you say?"

Li Fan didn't reply, but muttered to himself: "Impossible...... If this is below the riverbed, and we happen to be swept into it by that whirlpool, where is the river water, silt, and the fragments of the raft? Besides, this room is only a few dozen cubic meters, and there is really water flowing in, and such a space will be filled up quickly, how can it continue to produce whirlpools?"

Li Fan looked up at the top of the room again, and his expression became more puzzled: "The ceiling is intact, and this is obviously not where we first came in." He thought as he spoke, "Hmm...... Maybe we were swept into the ruins by the current, and then moved by some force to get to the current room. ”

John said with a "what the hell are you kidding me" expression, "Do you think it was made by a mermaid?" Or is it some kind of drainage filtration system for living creatures?"

Li Fan laughed dryly: "Hehe...... You can keep both assumptions until we find out the truth. ”

John sighed helplessly, and went back to study the murals.

Li Fan circled around the room for half a circle: "Do you see anything from those words?"

I thought that John would continue to talk nonsense, but I didn't expect him to suddenly say seriously: "Yes, this is indeed an ancient ruin, belonging to the Aztec civilization." ”

Li Fan looked surprised: "Can you really read the words on the wall?"

John smiled awkwardly: "Well, to tell you the truth, my expedition team is not the kind of team that climbs the mountain through the forest, and then takes a few photos and brings back some local products." We are more focused on doing some archaeological excavations. ”

Li Fan pursed his lips and said, "You just said that you would rob the tomb?"

He didn't react much on the surface, but in his heart he was quite surprised.

Although he had been in contact with John for less than two days, he saved John's life no matter what he said, and he could be said to have done his best along the way to survive, and he also told a lot of what he knew.

Unexpectedly, John, who was on the verge of collapse these times, has been hiding his true identity and purpose.

"What are you here for this this time?" Li Fan then asked.

John shook his head: "No, that's not our original goal. The Aztec civilization was supposed to be in Mesoamerica, and I was surprised to see this kind of writing here. But as far as I know, the Aztec civilization existed more than 1,000 years BC, and it was supposed to be a Stone Age civilization, and it was impossible to make such a room with flat stone walls, so the room we are in ......"

Li Fan took over the conversation: "Don't say that this is an alien man-made ......"

John also felt that his idea was very unreliable, and smiled awkwardly: "Hehe, I'm just assuming." ”

Li Fan couldn't help but quipped: "If your hypothesis is true, you won't have to be a tomb robber in the future, and after you go back, you will publish a paper to round up the story thousands of years ago, and by the way, use this set of theories to explain the achievements of the Mayans in astronomy, I estimate that if you can get back some of the things here as proof, you will be able to win the Nobel Prize directly as soon as the paper is published." ”

When he said this, his movements suddenly froze, and then he shouted: "I'm leaning on ......."

John didn't understand what Li Fan meant by "I rely on", he hurriedly asked, "What's wrong?"

Li Fan stepped aside and pointed to the wall, and a clear mark appeared on the flat wall between them.

There was a secret door in this wall.

"Shet!" John couldn't help but scream.

The two hurriedly pushed the door, but they didn't expect that the stone door, which they thought should be very heavy, was gently pushed and rotated, and it was estimated that there was some axis mechanism inside, and it turned one hundred and eighty degrees directly, and pushed it over with two people.

Then the stone door was closed again, and the walls were smooth and smooth, as if there had never been a door on the door.

Second, Li Fan and John were surprised to find that their environment had changed.

The original square metal room is now cylindrical, with the same flat walls, dense frescoes and texts, the only difference being the shape of the room.

"That door won't open!" John turned back to push the door they had just opened, only to find that the wall was not moving.

"This could be some kind of trap that can only be triggered from one side. Li Fan touched the wall and turned away.

"I guess that's the secret to moving again after we fell to the bottom of the river. As he spoke, he surveyed his surroundings and walked towards another wall.

"Look, there's a door on this wall too, huh, there's a handprint on it!"

Li Fan half-squatted, looked at the symbol and said: "It's smaller than an adult's palm, it looks like a child's ......."

"What?" John's expression changed slightly, "The black humanoid?"

"Yes, and you see the height, it should be about the same height as that creature, and if we want to touch it, we have to bend down. Li Fan said.

"So?" John looked at Li Fan expectantly, expecting the other party to give an answer.

Li Fan smiled bitterly: "I guess...... Maybe the Aztec civilization did not perish, but survived in the underworld after some major disaster or change, and the black creatures we see may be one of the survivors?"

John rolled his eyes: "It seems that you may have more success in writing a paper to compete for the Nobel Prize......"

Li Fan smiled: "I'm just guessing, but now I think that the instruments you brought are out of order, and there are ...... Nine times out of ten, the plane fell from this ruin, and it is likely that the strange magnetic field was emitted from here. ”

John sighed and said dejectedly, "What's the use of guessing now? ”

"Let's go to the next room. Li Fan said, pushing open the door on the wall.

"This underground space can't be infinite, let's explore it first, maybe we can find something useful. ”

This time the room was zigzag, like a zigzag corridor, Li Fan and John stayed in the middle section, they searched again, the room was empty, except for the frescoes and words, they found nine doors that could be opened.

"I think...... Let's not separate. Facing as many as nine doors, John looked at Li Fan with a nervous expression.

"Of course, go ahead. Li Fan took a deep breath and casually pushed open the door closest to the two.