It needs to be both hidden and convenient for transportation.
The Water Curtain Cave in Huaguoshan doesn’t meet your requirements!
Radar can detect large cavities, but it cannot detect trails that are too small. It is still necessary to go down to the ground for on-site inspection.
The engineering team was escorted by the hunters to the top of the cave and soon opened a borehole more than 300 meters deep and 20 centimeters in diameter.
Several unmanned detectors were put in, and the situation in the cave was immediately clearly transmitted back to the lighthouse.
Lin En summoned the top management and top talents in various fields of the lighthouse, and everyone looked at the scene returned by the detector.
This is a huge oval-shaped cavity five kilometers long and two kilometers wide.
Although the bottom occasionally has some undulations, it is generally flat. The top is like a huge semicircular pot lid, and the highest point is more than a thousand meters above the ground.
Moreover, there is an underground river flowing at the bottom, with a small amount of water.
After the detector turned off the light, dots of fluorescence appeared in the entire river. It was not dense, but it was obvious that there was a certain amount of mana plankton in the river.
"This is really good news!"
"The space is huge and there is running water. If it is fully developed, the lighthouse can accommodate even ten times more people!"
"Where is the exit? Can you find the exit?"
Everyone started discussing with great interest.
Under the control of the staff, the detector followed the gentle water flow and searched downstream.
Soon, it emerged from the mountainside of a valley, and the underground river flew down from here, forming a waterfall.
The canyon may have been a river in the past, but now it has dried up. Only the water from the underground river has given it a little life.
"This exit is too inconvenient for traffic! Is there any other exit?"
The people in the Engineering Department obviously felt that this exit was not ideal, but the city defense army did not think so, and they immediately retorted:
"But it's safe here!"
"This place is at least forty meters above the ground. It can already isolate most of the pole-devouring beasts, and it can be left from top to bottom. Why is it not good?"
"You can set up a lifting platform or dig a passage along the mountain wall. This is feasible!"
The differences between the two departments are serious, and the advantages and disadvantages of this outlet are very obvious.
In terms of construction difficulty and transportation conditions, this place is very inappropriate, but in terms of safety, it is almost perfect.
Lin En finally decided to take someone to go there in person.
The next day, he invited Bai Yuekui to bring her equipment and the lighthouse engineering staff to the top of the valley.
Everyone tied ropes and went down to the entrance. After unloading the equipment, Linn looked at the place.
The entrance is not small, the view is quite wide, and it is nearly fifty meters above the ground.
The gentle water of the underground river floated down, and many of them were blown away by the wind before they even hit the ground.
"The amount of water is not large now, but it might have been a big river in ancient times!"
Bai Yuekui next to him looked at it for a few times and then said.
Linn agreed with her statement because there was a seven or eight meter wide river bank next to the underground river flow, with many traces of water erosion.
"It seems that the water volume of this underground river may have begun to decrease tens of thousands of years ago."
"As long as there is still water, let's go in!"
Lin En saw everyone arriving, then led the way towards the depths of the passage.
It got darker and darker as we walked, and everyone turned on the lighting equipment one after another.
More than half an hour later, everyone arrived at the large cave together.
The entourage turned on several lighting equipment in scattered ways.
The snow-white light instantly revealed the outline of this place to everyone.
People in the engineering department started hypothesizing equipment and measuring data.
They need to detect everything here, including rock composition, air quality, and water source quality, and then comprehensively consider all aspects of the conditions to determine whether a city can be built here.
Bai Yuekui led others to try out the Mana ecological interactive device.
A young girl took the equipment and sat by the water, putting several long chains into the water.
After a while, I clearly saw many flashing fluorescent creatures gathering over me, as if they were a sea of greedy fish surrounding the keeper.
"Congratulations!" Bai Yuekui raised his head to congratulate Lin En.
Lin En breathed a sigh of relief, it seemed that the biggest problem was solved.
After a while, the engineering surveyor came over with excitement and reported,
"Lord City Lord! The geology here is stable and the rock composition is very ideal. Especially the iron content is very high. It can fully withstand large-scale construction!"
"We suspect there is high-quality iron ore nearby."
"The air quality is also very good. There must be other ventilated places inside the cave."
Lin En nodded, "Today is all good news. Continue surveying and mapping, figure out everything here, and we'll talk about the rest when we get back!"
Then he turned to look at Bai Yuekui and said, "Our cooperation can begin!"
"Don't worry, we have already manufactured multiple sets of interactive equipment, and we will send them to you one after another!"
…
After the detection, Linn and the engineering staff returned to the lighthouse with the data.
Most of the personnel on the lighthouse, including engineers, designers, the Ministry of Agriculture, the Ministry of Engineering, and the City Defense Army, gathered together to discuss the various possibilities of building an underground city here!
Everyone participated enthusiastically,
Several sets of new city design plans were formally proposed.
Various designs including honeycomb shape, lighthouse shape, pastoral shape, urban shape, etc. were discussed repeatedly.
What architectural style should be used and what should be done with the construction materials? Can construction machinery be modified and where can it be obtained?
What about security measures?
What are the methods of obtaining energy?
After countless possibilities and countless considerations, a final plan was placed in front of Lin En.
Lin En looked at the city model projected in front of him,
It was a high-tech city. During the day, "sunlight" like the sun would fall from the domes. Under the sunlight, bright and shiny buildings were distributed among the straight streets.
In the center of the city, a tall building rises from the ground, overlooking the entire city.
There is a symbol of the Lord of Light and Shadow on the top of the tall building!
The city is divided into several areas, with production areas, accommodation areas, and commercial areas in order.
But at night,
The dome "sun" goes out.
The city became the color of steel and neon,
Various projections, various shops, and bright lights can be seen everywhere on the streets, illuminating the entire city in red and blue, which has a fantastic visual impact.
"It's indeed beautiful!" Linn nodded first, then his tone turned stern.
"But we shouldn't just think about beauty! Can you tell me how much energy this city consumes? And where do we get so much energy from!"
"Geothermal!" The engineer who came to report to Lin En said with a flushed face and an excited expression:
"We are already underground, why not use geothermal energy as energy, which will be inexhaustible and usable!"
