The 10 most bustling and quietest cities in the world: 3 are in the United States, 3 in Italy and are unmissable destinations.

In the frenetic pace of modern life, some cities stand out for their constant hustle and bustle and the lack of tranquility that characterizes their streets.

These urban centers, full of movement and incessant activity, become symbols of the hectic life that many people experience today. But what is it that makes these cities so hectic?

The answer can be found in a combination of factors, ranging from population density and traffic to the economic and cultural activity that defines them.

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Here are the 10 noisiest and least quiet cities in the world, shared by the insurance company MoneySuperMarket Travel Insurance.

3 in America and 3 in Europe: which cities are the noisiest in the world?

Cities are ranked depending on a variety of factors. These include: noise level, air pollution, pace of life, number of tourists and population density.

Here are the top 10 noisiest cities, according to MoneySuperMarket Travel Insurance.

• Paris: France's capital city has a score of 54.7 out of 100 in terms of serenity. However, analyzing the decibel index (db) this city has 58, i.e. it has a low noise level.

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The Eiffel Tower receives millions of visitors every year and has a constant flow of people (Source: Freepik).

• Naples: this European city located in southern Italy has 54 out of 100 in terms of serenity and, in terms of decibel index (db) it has 59, that is, it is a city with low noise level.

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The large number of vehicles and the particular driving style of Neapolitans contribute to a chaotic and noisy environment (Source: Italian Ministry of Tourism).

• Milan: this northern Italian city has a 53 out of 100 for serenity. Likewise, the decibel index (db) is 58, i.e., with low noise.

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Sempione Park is one of the most popular green areas in Milan and attracts the most people (Source: Italian Ministry of Tourism).

• Venice: this city located in northern Italy is rated 53.6 out of 100 in terms of serenity. On the other hand, the decibel index (db) is 63, i.e., it has high noise.

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This city is the most visited. Its canals and landscapes make it attract many tourists (Source: Google Maps capture).

• Brussels: being the capital of Belgium, this city is ranked 53.3 out of 100 on the serenity scale. Also, the decibel (db) index is 55, it has a bit high noise level.

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• Philadelphia: being the largest city in Pennsylvania, United States, it has a score of 50.1 out of 100 on the serenity scale and, in terms of decibel index (db) it has 59, that is, it is a city with a slightly elevated noise.

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Its bustling atmosphere can be a thrilling experience for some, while for others it can be overwhelming (Source: Google Maps capture).

• Marseille: this city in the south of France has a serenity score of 50 out of 100. As for the noise index, it has a score of 66, so it is a city with high noise.

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Marseille is the largest port in France and one of the most important in the Mediterranean. The constant movement of ships, cranes and dock workers creates a busy and noisy environment (Source: Archive).

• Los Angeles: this southern California city in the United States has a serenity score of 49.3 out of 100. In terms of the noise index it has 65, that is, it is a city with high noise levels.

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Although not as dense as other cities on this list, Los Angeles has a considerable population, especially in areas such as downtown and Hollywood (Source: Archive).

• Istanbul: This city located in Turkey has a serenity score of 47.9 out of 100. In terms of noise levels, the city has 64, so its noise level is high.

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This city has a high noise concentration (Source: Archive).

• New York: the most populous city in the United States, has a serenity index score of 47 out of 100. In the decibel (dB) index analysis, the city has 69, i.e., it has a high noise level.