Go find the monstrous icon of world famous cities

Pink water pipes, Cau Tu su . are extremely special symbols of famous cities such as Berlin or Prague .

When it comes to a city, we often attach them to a certain symbol. For example, mentioning Rome is a reference to the Colosseum Arena and 10 million scooters, or San Francisco is a great place for director Michael Bay to film, or Paris is Effel tower and Louvre museum .

However, the cities below are famous for their extraordinary and unusual things .

1. Berlin - the city "pink pipe"

The name is probably too strange for anyone who has never set foot in the German capital. However, just once to this city, you will understand the cause. That's because Berlin is surrounded by a very strange pink plumbing system.

So, what is the above pipeline system built for? The answer appears in the name of the city. In the old language, Berlin meant "swamp city". That means, the daily German capital faces the risk of collapse with the weak ground below. On the other hand, the groundwater level is only 1.8 m above the ground, and there is a risk of rising and turning Berlin into Germany's Venice at any time.

Therefore, the government here has built a huge drainage system surrounding the city, the starting point is Potsdamer Platz square. To ensure aesthetics, the architects decided to choose pink to paint for these pipes.

2. Tokyo with an emergency tunnel to avoid disasters

Tokyo (Japan) is one of the modern industrial cities but suffers from the most natural disasters in the world. In the 1950s and 1960s, the city was often hit by heavy storms and terrible floods, severely devastating the Japanese economy.

The beautiful city of Tokyo is always at risk of natural disasters

However, instead of calling heaven to call the land, the people of the cherry blossoms were so used to 'living with floods'. They even found a way to cope with these disasters.

Specifically, the Tokyo government has spent a lot of money and wealth to build a huge tunnel to prevent natural disasters such as earthquakes and storms. The project was built in 13 years, from 1993 to 2006 and cost up to 3 billion USD (more than 63,000 billion VND).

The system is nearly 6 km long with large tunnels and 5 emergency doors operated by turbines with a capacity of 14,000 horsepower, which can drain approximately 400,000 ^{m3 of} water to the Edo River. Currently, in the face of climate change, local authorities have been planning to build such next tunnel systems in the near future.

3. Prague - city with a suicide bridge

Prague - the capital of the Czech Republic, is one of the most beautiful cities in Europe with a peaceful river and ancient houses that bring a very calm feeling of Eastern Europe.

But if you look carefully, you will discover the strange features of this city. In Prague there is no shortage of terrifying statues, memorials and cemeteries, located among beautiful architecture.

And this is the most formidable point of this city: Nusle Bridge. This is a 42m high bridge, more than 480m long and cut across the residential areas of Prague. Built during the Cold War, Nusle Bridge is also known as Nuselsky Most. However, the most well-known name for this place is the 'Suicide Bridge'.

A bridge is always subdued with a gloomy, scary atmosphere

This name comes from a sad situation. From 1973 to this time, there were 200-400 people looking to pray to . suicide. Even, according to the residents living around, the bridge at night became more and more scary by the screaming sounds.

4. London and the forgotten rivers

When it comes to the river in London, surely everyone will talk about the Thames. The truth is that in London alone there are 21 different rivers, all of which are large flows into the Thames.

However, most of these rivers exist only in the historical past. In medieval times in the UK, the city of London consumed a huge amount of water: from daily activities to economic activities, tourism . Over time, the population was increasingly crowded making the rivers in London contaminated and depleted.

The first is the Walbrook River - the first river of the city was exhausted in 1460. By 1710, the River Fleet river had been shunned because the river mostly contained dung and dog carcasses.

Gradually, London's rivers shifted from water supply to scary water streams. Finally, the authorities here decided to bury them on the bottom of the infrastructure. To this day, the rivers still exist, but are hidden in the corner of London.