"A city under the sea?" Su Xia's heart moved, and a lot of related legends flashed through his mind. It is rumored that there was a rather glorious civilization in the past, maybe 10,000 years ago, or even earlier, in short, the degree of prosperity was no worse than now.

But later, this civilization disappeared into the long river of history and can no longer be verified. It is said that the torrential rains that had been falling for hundreds of years caused the water level to rise and submerged the entire civilization.

It is also said that something happened to the moon, which caused the earth's tidal abnormalities and a terrifying tsunami, causing the entire civilization to be swallowed up by the tsunami.

There are different opinions, and everyone has their own opinions. Most of them are related to extraterrestrial civilizations.

The Underwater City, also known as the Lost City, is still a fixture in many literary works, especially about adventure, exploration, and mystical worlds.

"Is there really a prehistoric technological civilization?" Su Xia asked curiously.

"No, it's just a stone ruined city, it's just at a depth of more than 10,000 meters under the sea, so it looks very mysterious." The big whale shattered Susha's illusion, and in his mouth, it was just a primitive city made of various stones, far from the legend

"Prosperous",

"Technology" is 108,000 miles behind. As for why the city sank to the bottom of the sea of 10,000 meters, the big whale is not clear.

When he was a little sea monster, he used to hear some reasons from the sea monster, and the sea monster was told by the old sea monster, and the old sea monster was heard from the older sea monster.

In short, this kind of word-of-mouth news and stories must have been distorted long ago when they reached his generation.

"I heard from an old-timer that the city was originally built on glaciers, and then climate change, the glaciers split, and part of the glacier where the city is located slipped into the sea, and as the glaciers melted, the city gradually sank to the bottom of the sea." The big whale talks about the version of the story he's heard.

"I see." Su Xia was thoughtful, and a relatively vague picture appeared in his mind. After all, human beings are too small to imagine the power of nature.

For example, on the other side of the earth, fossils of marine life can be found on the mountains of several thousand meters, and many things seem to be incredible, but in fact they are just the magic of nature.

The city under the sea sounds very mysterious and seems impossible to exist, but it is possible to be born by all kinds of coincidences.

Time passed, and the distance of more than 200 kilometers passed in a flash. Suxia has officially entered the Far North Sea.

At this moment, large and small ice floes are floating on the sea level, and the ice floes fluctuate with the waves, making a loud noise, and the whole world is snow-white.

If you go any further, these ice floes will turn into a thin layer of ice, which will have an impact on ships at sea.

Fortunately, the temperature under the water is always above freezing, and there is no resistance when sailing.

"There's the underwater city up ahead, can you see it?" The big whale asked.

"Of course I can't see it, this submarine has no windows." Susha replied.

"Open the window."

"No, it will affect the overall resistance to pressure and stealth."

"Stealth?" The big whale is also curious,

"How to be invisible? Disappear from my eyes? ”

"No, it's just conventional acoustic stealth, electromagnetic stealth, infrared stealth, etc., which are only aimed at the enemy's reconnaissance equipment, which can be seen with the naked eye."

"What kind of stealth is that? Completely invisible is called invisibility. ”

"There's no way, it's limited by technology, so it's the only way to go." During the exchange, a man and a whale approached the silent underwater city.

This is the bottom of the Far North Sea, about 13,000 meters, almost a forbidden area for life. Su Xia stood in front of the console and dispatched more than a dozen deep-sea exploration robots from submarines, letting these little robots serve as eyes to feed back real-time underwater images for Su Xia.

The underwater water is surging, cold and dead, and it should have been pitch black. However, on the display screen above the console, more than a dozen pictures fed back by the little robot turned out to be not completely dark, but countless small dark blue light spots like stars flickering.

"Huh...... What's glowing? Susha focused. This scene is surprising. When I got closer, those small points of light turned out to be translucent jellyfish swimming one by one.

These jellyfish are only the size of a palm, and their almost transparent bodies are light blue, very soft, swimming slowly, lazy with a hint of elegance, like little angels, and each time they swim, the canopy flips to produce a pale blue soft light.

In the small tentacles behind them, there was also a little bit of blue light flashing. In the picture, thousands of small jellyfish, all glowing and flickering, like a little starlight in the night.

"I really didn't expect to see these little things at such a deep place under the sea." Susha realized that this was a group of mutated creatures, otherwise they would not have been able to survive in such a deep area.

Ahead, it was the ancient city that had sunk to the bottom of the sea. Indeed, as the big whale said, this underwater city does not have any sense of technology.

In the picture fed back by the little robot, there are only sloping stone pillars, broken stone stairs, and collapsed stone houses, which are the remains of a civilization built purely of stone, lying quietly on the cold seabed.

Gently wipe away the dust from the bottom of the sea on the surface of the stone pillars, and under the illumination of the lights, you can see that the stone pillars are pale gray, and the surface is carved with some complex and strange patterns, like ancient altars or temple support columns.

"It seems to be similar to some of the remnants of civilizations in Latin and Central America." Su Xia thought thoughtfully, and when he saw this stone pillar, he thought of similar traces of civilization on the other side of the earth, such as the ruins of the Mayan civilization in Mesoamerica.

He is now on the edge of this underwater ruin, not yet deep. In the ruins, there are patches of collapsed stone buildings, most of which are covered with gray seabed debris and dust, and it is impossible to see the original appearance.

Many small blue jellyfish roam through the ruins of this civilization, like blue elves dancing on the ruins, and make this place their home.

"Keep going." Su Xia gave the order, and more than a dozen small robots outside began to explore the ruins deeply, while the big submarine stayed outside in case of emergency.

The actions of the little robots caused the water flow in the ruins to fluctuate strangely, and the surrounding jellyfish seemed to be a little frightened and moved away, making way for these little robots.

As the little robot deepened, more and more pictures of civilization relics appeared in front of Su Xia's eyes. The city was huge, far larger than Susha had imagined.

The city's roads extend in all directions, very wide, and its original prosperity can be vaguely seen. In the feedback picture, in addition to the collapsed stone houses, some other things gradually appeared, such as stone flower beds, horse-drawn carriages, human figures, reliefs, etc., all of which were huge and exquisitely made, not rough.

In the upper left corner of the display, in the picture fed back by the little robot, there is a huge stone human head, with a diameter of seven or eight meters.

Behind the human head, a shattered stone body. It was apparently a stone statue of a complete human body, only to collapse and shatter into pieces, and the broken stones rolled haphazardly down the roads of the ruined city.

[Metalwork found] The little robot suddenly sent a message. In the footage he fed, it can be seen that he stretched out his mechanical arm and found a huge trident-shaped metal weapon in a pile of rubble, but this weapon has long been rusted and corroded by the seawater, and it is almost integrated with the dust on the seabed.

This trident weapon may have been held in the hands of this giant humanoid stone statue. Follow this ruin-filled road and continue deeper.

Behind this pile of broken stones, many similar piles of stones can be seen, scattered on both sides of the stone pavement.

It seems to have been an extremely important central road of the city, and on both sides of the road, there should have been majestic stone statues of soldiers holding tridents, but now they have collapsed over the years.

"How's it going, did you find anything?" The big whale suddenly asked.

"Nope." Su Xia shook her head.

"I'll just say it's a stone city, but you humans are particularly curious about this undersea civilization." Big whales have lived on the bottom of the sea for hundreds of years, and they have seen more underwater ruins, and they are not interested in the mysterious civilization that humans talk about.

He was probably only interested in things on land, after all, he had never been to the land world.

"Let's see." Su Xia concentrated and looked at the picture on the screen, not disappointed or anything, but continued to explore with a sense of curiosity.

On the screen, the little robot passes through the road full of rubble and then goes some distance deeper.

In front of him, a tall stone altar appeared. There are twelve stone pillars around the altar, most of which have collapsed, either broken or broken into many pieces, and are no longer in shape, only a few of them are still standing crookedly.

The altar was at least thirty meters high, and a long stone staircase led from the bottom to a kind of round platform leading to the heights, the stone was black-gray in color, and over the years even the steps had broken and become incomplete, some with gaps, others into several pieces.

On the stone round platform at the height, there are also some mysterious symbols and patterns. It is conceivable that this once glorious period of ancient civilization would certainly have something similar

The "priest" is a person who stands on a high altar and leads thousands of people below the altar to offer sacrifices to their imaginary gods, either for peace or for a good harvest.

The little robot climbed onto the altar and looked into the distance, there were still a large number of ruins in front of it that had not yet been explored, and in the depths of the ruins, there was a huge shadow.

"What's that?" The sea is dark, blocking the view and blurring the picture in the distance. Su Xia's eyes narrowed slightly, and she looked carefully.

In the depths of this civilization, in the very center of the city, where many stone roads converge, a huge shadow stands, which seems to be a ......

"Pyramids?" Su Xia looked stunned, blinked his eyes, and thought he had seen it wrong. He immediately gave an order, urging the dozen or so small robots in the ruins to speed up, all of them heading towards the very center of the ruins, approaching the huge shadow in the center of the city.

As the distance dragged in, the shadow gradually revealed its true face, and it was indeed a giant pyramid!

"It's strange that there are pyramids in this civilization." Ahead, in the center of the ruins, the pyramid, at least three hundred meters high, seemed to be a giant holding up the sky.

It is made of huge stone blocks weighing several tons or even tens of tons, and it is magnificent and breathtaking, as if it was a miracle created by the gods, and it is hard to imagine how it was built by man.

In ancient times, when production capacity was backward, how to build such a brilliant building? More than a dozen small robots measured in turn, from the top of the tower to the bottom of the tower, and finally according to the analysis, a relatively accurate data was obtained.

Three hundred and three meters! The giant sea monster of the big whale, if you stand up, is only more than 300 meters high, which is not much higher than this pyramid.

"Is this also a grave?" Su Xia remembered that on the other side of the earth, almost all of the pyramids built by the ancient Egyptians were mausoleums for the burial of kings and queens.

Of course, there are some sacrificial buildings, temple buildings, and palace buildings, which also adopt the shape of pyramids, such as the tower temple of the Sumerian civilization in the Mesopotamian plain, which is a temple building that symbolizes power and faith.

Su Xia felt that if it was a tomb, it seemed a little strange to be located in the center of the city.

"Find out if there's an entrance." He sent instructions to the dozen or so little robots to explore around the pyramid to see if there was an entrance.

If it is indeed a tomb, then there must be a large number of valuable funerary goods in the tomb. Su Xia didn't want to rob the tomb, but just wanted to carry out archaeological excavations.

"If it's not a tomb, but a temple or something, there should be sacrificial supplies in it." Su Xia's eyes flickered, looking at the screen and thinking.

"What if it's neither?" The big whale suddenly cried out.

"What do you think?" Susha asked the big whale.

"Portal."

"What?"

"Portal, an old sea monster told me the name." The big whale said a very strange name, and then said to Su Xia: "When I was young, I heard some old sea monsters say that this kind of triangular building may be a kind of energy tower. ”

"What's the effect?" Susha asked.

"Connecting civilizations beyond this planet is ...... Contact extraterrestrial creatures. ”

"Transmitting signals to the outside world?"

"Yes, it should be understandable." The big whales aren't so sure,

"This is what some ancient sea monsters said, in ancient times, this kind of triangular shape of the building was used to communicate with the outside world."

"And that kind of statement?" Su Xia pondered, thought for a moment, and then said: "This civilization relic has not developed enough brilliant science and technology, so it should not be able to contact with extraterrestrial civilizations, unless...... There are real extraterrestrial civilizations that have descended on this planet and given the way the pyramids were built. "Based on this, it is speculated that there were aliens on this planet 10,000 years ago?

Of course, only one possibility. If the guess is true, then can this energy tower still be used, and can it be contacted again?