In Australia, unless there are lights in the most famous underground caves, there are no lights in the general caves and sinkholes. In the many cave sinkholes in the Nullarbor National Park, very few are illuminated, and everything is pristine and natural.

The same is true of the sinkhole, including the underground cavern and the underground tunnels, where there is not even the slightest lighting installed.

However, counting the people who joined later, the crowd of people who were ready to explore the underground tunnel reached seventeen people, which can be regarded as a large number of people, and the flashlight held by each person has already shone the entire underground tunnel.

When there are more people, the popularity is booming, so many people are laughing and laughing, and the laughter and laughter have washed away all the gloomy atmosphere that was originally underground. Now, in addition to the extra coolness in this underground tunnel, the originally somewhat frightening aura has long disappeared within the range of the light.

This underground tunnel is a typical underground karst landform, and according to the tourist brochure, this winding underground tunnel should have been the channel of an underground river long ago.

The tunnel is quite spacious, about two and a half meters high, enough for an adult to stand up straight and walk in it, and about three meters wide, enough for two or three people to walk side by side, but this tunnel is full of strange stalactites, so be sure to pay attention to your feet and the top of your head when you move forward, otherwise you will easily have a close contact with those hard limestones.

Under the light of the flashlight, the stalactites in the tunnel reflect a variety of colors, because the mineral elements contained in the stalactites reflect different light spectrum under the light. The tunnel is very dry, there is no cold feeling of underground karst terrain at all, and because both ends of the tunnel are connected to the outside world, there will be wind passing through the tunnel from time to time, bringing a hint of coolness.

Although there is no lighting in the tunnel, the staff has drawn many signs on the walls of the tunnel to tell visitors what to do, because as the tourist brochure inscribes, there are many forks in this underground tunnel, and some of them look even wider than the main tunnel, so you can't help but go in and take a look.

However, there are very conspicuous markings on the rock walls near these forks, reminding visitors that it is best not to enter these forks, because some of the forks are so deep that even the staff do not know where the forks will lead, so if you enter those forks, there is a great chance that you will get lost in them and never find your way out. In the words of the outside world, it is that this tourist has lost contact

For ordinary tourists, this kind of underground tunnel like an underground labyrinth is naturally full of mystery, but it will also make the vast majority of tourists dare not venture into these forks in the road. But for the current Tang Feng, this extremely wide underground tunnel is nothing at all, with a star core by his side, a full detection range of ten square kilometers, which is enough for Tang Feng to easily grasp the path of this underground labyrinth.

Long before entering the tunnel, Tang Feng secretly let his consciousness enter the star core space, and then ordered the star core to start the exploration of this land, although this would consume at least 2% of the star core's energy storage, but Tang Feng still gave the order.

For Tang Feng, although the mining disaster did not cause him any psychological shadow, Tang Feng still adopted the principle of caution when facing the unknown underground tunnel. The mining disaster made Tang Feng realize that as long as he went underground, no matter what, it was always right to be careful.

Besides, Tang Feng walked all the way from the Norman town and walked nearly 800 kilometers, and along the way, the radioactive elements within the range of the star core's independent absorption pathway, and now the energy storage of the star core has risen from 47% after condensing natural silver to 68%, and it is nothing to spend only 2% of the energy to probe this underground labyrinth.

The most important thing is that since the fusion of the star core, Tang Feng found that he vaguely seemed to have an indescribable feeling about this planet, that is, once something rare or something needed by the star core appeared, Tang Feng would always feel the kind of hint from the underworld, as if his intuition had improved a lot.

Before meeting Sophia, Tang Feng had encountered such a situation when he was driving, when Tang Feng was driving, he suddenly felt that something seemed to attract him on the side of the road, so Tang Feng stopped the car and walked to that location, and as a result, using the detection function of the star core, Tang Feng found a copper mine with not very large reserves

Copper ore is a precious thing anywhere, although the burial site of this copper mine is relatively deep, more than 200 meters, and the reserves are only larger than the reserves of the copper mine condensed by the Tang Mine, but if it can be surveyed, it can be sold for tens of millions of dollars!

Last time, a small copper mine was discovered, and this time when he came to the bottom of the sinkhole, that feeling of darkness came to Tang Feng's body again, so Tang Feng decided to turn on the detection function of the star core to see what good things were attracting him underground.

However, to Tang Feng's disappointment, until he led the large army down the underground tunnel to the cave at the other end, Tang Feng did not find anything valuable. This made Tang Feng feel very strange.

For that feeling, Tang Feng is convinced, logically speaking, as long as there is this feeling, then as long as you find the right direction, you will definitely find something. But this time it seemed that something was wrong, which made Tang Feng feel very depressed.

Seeing Tang Feng's somewhat sullen appearance, the elated Sophia patted Tang Feng's shoulder and asked, "Don, we just completed a great underground expedition, why am I a little unhappy to see you?" ”

Tang Feng was stunned for a moment, then a smile appeared on his face, and he said with a smile: "I'm just feeling the magic of nature, and I'm not unhappy!" ”

"Yes, yes, this place is really amazing, if I hadn't been here myself, I would never have imagined that there would be such a scale of underground tunnels under this flat plain. And I really want to go to those forks and see where they lead. The tourist brochure says that these forks in the road have not even been explored by government staff! ”

Hearing Sophia's words, Tang Feng's heart shook violently, and he thought: "Yes, this underground tunnel covers too much area, and the exploration range of the star core space is only ten square kilometers, that is, the radius is almost 1.8 kilometers, this range is far from meeting the requirements of completely exploring the entire underground labyrinth, maybe the thing that attracts you is outside the detection range of the star core space!" Well, by the way, it seems that when passing by a certain fork in the road, the feeling of attraction is a little stronger."

Seeing that Tang Feng fell into a daze again, Sophia patted Tang Feng a little unhappily, "What are you thinking?" ”

Tang Feng grinned, showed a mouthful of big white teeth, and said to Sophia with a low smile: "Do you want to explore those forks in the road with me?" ”