There is only room for one person at the entrance, but there is a bustling city underground , where

Such dungeons were also built in Vietnam during the war. At that time, such a dungeon was naturally used for military purposes, but in such a relatively peaceful era now, it will naturally not be used for military purposes. It is more of a commemoration of the Vietnamese people who lived in the flames of war, and the Vietnamese soldiers and civilians who sacrificed their lives for peace in Vietnam.

However, there were originally many such dungeons, but most of them collapsed with the passage of time, and the underground scenery can no longer be used for people**. <>

However, while most did collapse, there are always some dungeons that will remain, and they are strong enough。But it's a dungeon, and think about the war years when people can live and die for what they eat today, or what they eat tomorrow. People are busy surviving, busy fighting for the cause of peace, will there be time to actually build a dungeon?

And how could it be that the people of that time could build a dungeon if they wanted to? <>

So this Vietnamese dungeon is simply an authentic one。Of course, even authentic ones can be good or bad. Vietnam's Chi Lan Tunnel is famous, and such a famous tunnel naturally has its own characteristics, otherwise it would not be famous.

Vietnam's Chi Lan Tunnel can be said to be an authentic fighter jet. The entrance is small, that's for sure, if it's an authentic and the entrance is open, and any person can find it, the tunnel will lose its dignity as an authentic. <>

Therefore, the first condition for this Zhilan tunnel is that the opening is small enough and concealed enough。However, now it is used as a memorial without the need for tourists to look for it themselves, and the opening is quite eye-catching. Zhilan has its own inside, it can be said that there is everything in this Zhilan tunnel, which can be used for a normal person to live a good life.

Zhilan Tunnel is worthy of being Zhilan Tunnel, not only with complete facilities, but also quite strong.

Because Vietnam was in the midst of the War of Resistance Against France at the time, local farmers dug the tunnel with their bare hands, and the length of the tunnel was 17 kilometers. Later, during the Vietnam War against the United States in the 60s, the Cu Chi Tunnel was further expanded, from less than 20 kilometers to 250 kilometers today. Basically, it is all over the underground of Vietnam.

That's why it got the name dungeon.

This underground city was in the "Ho Chi Minh City" of Vietnam, which at that time was for war. The Vietnamese built these underground cities in order to avoid being discovered by the enemy in the mountains. The entrance to a tunnel is only one person wide, but it is 25 kilometers underground, and there are even corridors and toilets, from wells to hospitals, and an underground river.

So although it is an underground city, it is very prosperous.

It is an underground war tunnel dug by peasants and soldiers for more than 20 years during the period of resistance to French rule in Vietnam, and the entrance to the Cu Chi tunnel is quite narrow, only about one meter.

Coming from the war years, Vietnam was in the past, in order to avoid the invasion of war, people dug tunnels, and over time, the underground naturally formed an underground city, and in modern times, it has become a prosperous underground city.

Later, it was not able to bombard it down, because there were many traps inside, and it was divided into several layers, so I didn't dare to go in at all, and it was very prosperous inside, and it was well preserved.

Later, they used it for commercial purposes and vigorously developed it, making money from it, which also became a local characteristic.

This underground city is still preserved to this day and played a key role in the Vietnam War at that time, protecting the lives of many Vietnamese people.

Vietnamese dungeons were discovered, but people usually moved on the surface, and on the surface due to its abundance of oxygen and abundant sunlight, people were active on the ground, and people formed various races and groups of people on the groundBut in reality there is an underground city in Vietnam with an entrance of only one meter. What is this city with a small entrance but all the interior underground?

This underground city was found in Ho Chi Minh City, Vietnam, just like the ancient Chinese tunnels were excavated during the war, it was also a product of the war period, when the excavation was underground, and the main body was hidden. A 25-kilometer-long city with kitchens, bedrooms, meeting rooms, wells, hospitals, training grounds, factories and application facilities, located just 1 meter underground, can only be passed by one person at a time. It's not easy to be found by the enemy.

The city is divided into three floors and is very three-dimensional, and without the guidance of many experts, you will get lost here. The design is not only comprehensive, but also very complex. In previous wars, it was the best place for soldiers to rest and recuperate, and there was a lot of military power that could be saved with it.

When the dungeon was built, there was no reinforced concrete, so they were all ground rock structures. If there are bombs or **, they will quickly be destroyed by fighting Vietnam in the war. People discovered this underground city and used toxic gases, but the designers of the underground city did not ignore this problem, because considering this problem, they installed this protective door on the fork of each road very early on, so as to avoid a lot of toxic gases, the wisdom of the Vietnamese is not small, despite the long time, this underground city is still well preserved and the design is excellent.

Maybe it's just a fabrication, because there is no evidence to prove it.

I think it may have been a dungeon built underground to avoid disaster.

It should be a kind of dungeon built by people, not a place for other human beings.

This is probably because the local architectural style in Vietnam is like this.