The giant crater in front of him was not the original landform of Guqiu, so Lu Liran judged that it was a lava pipe left when the lava passed through this area and poured into the ocean.

Or after a pipe collapse.

The giant pit is the product of the collapse of the pipeline.

Lava pipes, also known as lava tunnels, are themselves cooled lava, because the surface of flowing lava is easily cooled and formed into a hard shell.

However, affected by the thermal insulation condensed into a solid shell, the lava flow flowing inside will be hotter than the outer layer, and the flow will not be affected by external factors because of this protective shell, so the flow speed is also faster, thus forming a lava flow. pipeline.

"The length of this kind of lava pipeline is quite long, some can even reach more than ten kilometers, and the drinkable fresh water I am looking for is probably in it."

Lu Liran looked around, looking for a way down.

The walls of the giant pit are covered with slippery moss. Although some angiosperm roots can be seen taking root around the giant pit, and those roots are even exposed, like hanging hands, but Lu Liran did not choose this road.

"These rhizomes look very tempting, as if they are saying that they can be trusted, and it will be fine to climb down with them." Lu Liran untied the umbrella cover on his back and tidied up the umbrella rope, "But in fact , These exposed rhizomes are covered with moss, very slippery, difficult to use strength, and easy to miss, very dangerous."

"So I'm going to use the parachute rope from before to make a simple downhill device." Lu Liran looked at the camera, and continued with his hand movements in an orderly manner.

The camera of the drone showed a close-up of Lu Liran's fingers, and as his fingers fluttered, each seemingly complicated knot seemed to become simpler and clearer

He used the paracord and the metal buckle on the parachute to make a separate anchor point, so that after he descended to the bottom of the pit, he only needed to perform a simple operation to retrieve the paracord and the buckle.

He slowed down the steps of making the separation and recovery anchor point as much as possible, and said: "This is just a very simple separation anchor point, suitable for half-rope or single-rope use, or when escaping by downhill. After all, in the wild, this The materials used are consumables, and if they can be recycled as much as possible, they must be recycled.”

Lu Liran couldn't bear to waste a piece of rope.

"This single-rope downhill method is very common, but it is also dangerous, so if you don't have the professional quality in this area, I would suggest that ordinary people choose detours or use other methods to obtain fresh water. I will demonstrate it to the audience in front of the live broadcast room." He continued.

"As for now, the height here is only about ten meters. It's not difficult for me, so we put efficiency first and go down first." Lu Liran said, pulling the fixed parachute rope, and tried it out Firmness.

The parachute was fixed, and he didn't hesitate any longer. He leaned forward to be perpendicular to the wall of the giant pit, locked the rope with his right hand, and began to descend.

As he descended, he signaled his own movements: "Slowly send the rope with your right hand, swing your legs back and forth to ensure that you descend at a constant speed, keep your body vertical, and don't change your body's center of balance by random movements because of panic."

"The balance of the center of gravity under the single-strand rope is very delicate, so if it is disturbed, it is very likely to cause the paracord to shake irregularly, hit the left and right mountain walls and cause injury." Lu Liran reminded, and fell two meters while talking.

[Didn't you mean downhill? Why does it look like an old lady going down the stairs, so slow]

[Laughing, this description is extremely appropriate]

[What the fuck, isn't this a demonstration? 】

Lu Liran glanced at the barrage, and didn't expect that some people thought he was slow, so he laughed and said: "The previous one is a textbook demonstration, but in actual use, we usually go faster."

After he finished speaking, he looked at the state of the parachute above his head, and after confirming again, he didn't say anything more. He skillfully scaled the rope in one go, and within two or three seconds of blinking, Lu Liran stopped at a position about one meter above the ground. Land firmly.

He untied the rope, and with light force, he freed the paracord that was tied ten meters above, and skillfully and quickly recovered it into a neat ball.

[Where is the person who said slowly? 】

[Gan, before I finish typing, the anchor came down! 】

[The time is too short to watch, report bad reviews]

【+1 It's too fast, I didn't even see it clearly! It is recommended that the host speed down from 50 meters! 】

[Upstairs is really a ruthless person]

[One thing to say, watching the anchor recycle the ropes so neatly, I feel so refreshed with obsessive-compulsive disorder]

[Yes, yes, yes, I also want to say, and the movements are so skillful, it is very pleasing to the eye]

[Then again, what does a handsome guy do that are not pleasing to the eye? 】

[At first I thought that the host was so good-looking, he must have embroidered legs, but I didn't expect to be really capable]

【I also】

Lu Liran raised his eyebrows. After retrieving the rope, he looked around the huge pit ten meters deep.

Surrounded by lush plants, the branches and leaves stretch upwards, enclosing the sky into a small circular window.

What you see from the perspective of looking up from the bottom of the pit is completely different from what you see above the pit. I thought the area was open at first, but when I got to the bottom, I felt as if the surrounding area was filled with dense vegetation.

A ray of sky. Lu Liran suddenly thought of this word, it seems that there will be such a symbolic scene in the mountains, but he didn't expect that he would see such a similar scene at the bottom of the pit.

He retracted his gaze, and after looking around, he found traces.

Lu Liran pointed to the location near the west: "Did you see that cave-like place?"

He strode over. The cave was about three to four meters high and six to seven meters wide inside. It was a very wide tunnel.

"Imagine, the lava flow that erupted here decades ago is so high and wide, and the temperature is enough to melt people instantly." Lu Liran whispered.

He stood in front of the tunnel, and the tunnel looked like a **** mouth, as if it could swallow him in one bite, and the contrast with the picture was more impactful.

【Hiss, is the volume of the lava flow so exaggerated...】

[To be honest, I always thought that lava flows are like streams orz]

【Me too, it doesn’t sound like a big guy ahhh】

[…The locals who were evacuated because of the lava flow said that the thing looks like a fire dragon! Behemoth Well, behemoth! 】

Lu Liran planned to go in, but before going in, he had to make some preparations.

"It's almost opaque inside, so I have to make a torch." Lu Liran took out the pips of the Xiguo pears that he had eaten earlier, and there were six of them, all of which were strung on a sharpened twig.

"As I said before, these fruit stones are rich in vegetable oil, and palm oil is extracted from these fruit stones, so they are still resistant to burning."

He first peeled some wood core velvet to make a torch, and the flint quickly ignited the flammable velvet, and then Lu Liran put the stringed fruit cores into the burning torch.

In less than half a minute, the top core of the fruit finally burned, and the small but bright flame gave people a sense of security.

"The torch has other uses besides lighting." Lu Liran explained, "If the color of the flame changes, it means that there may be some poisonous gas inside; or if the torch goes out directly, it means that there is no oxygen in it."

"No matter which position is above, it means that I must leave it as soon as possible."

Lu Liran walked into the lava pipe holding the "torch". He observed the situation of the flame, and it was very stable except for being slightly shaken by the wind.

He gestured: "Such a fruit core can burn for about six to seven minutes. This string should be able to support me to stay in it for half an hour. There is not much time, so I have to hurry up."

Lu Liran looked at Ke Ji behind him: "Follow me closely."

Ke Ji responded.

After walking not too deep, the area began to shrink, the space above the head was significantly lower, and the left and right became narrower.

Lu Liran illuminated the front and surroundings with a torch. There were many lava-formed stalactites above his head, shaped like shark teeth, or downward stalagmites, and lava stone vines like pipes.

Oddly shaped, but magnificent.

【So beautiful...】

[This is the first time I saw the inside of this place! Those volcano documentaries in the past didn’t have this in-depth live broadcast, did they? 】

【Really, good cow】

[Facing the inside of this tunnel, the check is swiped! — No shortage of money to give the anchor 2x exchange check]

"Although these lava stalactites are like works of art of nature, they are actually very fragile inside, and they are prone to local collapse, even without warning." Lu Liran warned.

"So once you get the water, get out of here as soon as possible."

They walked forward for about a hundred meters. The stone walls on both sides were cool and damp, and roses even bloomed in the cracks between the stones.

Lu Liran sucked against the stone wall, moistening his lips and throat.

"The water seeping out of the stone wall is equivalent to being filtered through layers, and it is pure water." Lu Liran said, "But the fresh water on the stone wall is too slow, and the current conditions do not allow it."

He quickened his pace: "There is water seepage on the stone wall, and I heard the sound of dripping water in front, it should not be far from us."

The two walked through the dark tunnel, but fortunately they didn't encounter too many forks, so they didn't get lost.

Not long after, an upside-down vine branch appeared in Lu Liran's vision, and the sound of water droplets came from the end of this vine branch.

Drops of water quickly gathered along the roots of these vines and hit the rocky ground.

When Lu Liran saw this, he couldn't wait to unscrew the kettle, and the water got stuck under these roots.

【what? ? ? There are actually plant roots here? ! 】

[unexpected, really unexpected]

[If it weren't for the anchor, it would be impossible to create such a set, I would suspect it was a script]

Lu Liran noticed the movement in the live broadcast room, he slightly bent the corners of his mouth, and sighed softly: "Indeed, when seeing these plants here, no matter who they are, they can't help but marvel at the strong vitality, those plants can actually penetrate the lava field the surface, put the roots here, and get as much nutrients and fresh water as possible."

He gently pinched the vine branch, and more water flowed down, as if it was inexhaustible.

Lu Liran was not greedy, and quickly saved up two water bottles for himself and Ke Ji, and the two quickly walked back.

However, halfway through the walk, a muffled sound accompanied by the shaking of the ground happened without warning!