No one is always a teenager, but there are always teenagers in summer in mountain cities. This sentence expresses that beautiful places always attract young people to visit. Everyone can't be a teenager forever, but there will always be countless teenagers visiting scenic places like the mountain city.

The mountain city here refers to the city built on the mountain, with beautiful scenery and the noise and prosperity of the city.

Some of the most beautiful mountain cities in the world:

Innsbruck, Austria 1.

As the "roof of Europe", the Alps also cover Austria. The ancient city of Innsbruck here is located in a deep valley with continuous snow-capped mountains and lush mountains. It is a permanent, tall and generous background of the city, and the climate and environment on the plateau have become particularly charming.

2. Rio de Janeiro, Brazil.

Known as the "City of God", Brazil's second largest city is one of the most famous tourist attractions in South America. Rio is located on the west coast of the Atlantic Ocean, facing the sea and backed by green hills. The natural environment is excellent, and the magical scenery of mountains and seas contrasts with the city, which is spectacular.

3. Zermatt, Switzerland.

This compact and exquisite mountain city is located in the Alps, surrounded by 38 mountains with an altitude of more than 4000 meters. It is a world-famous "car-free city" and "glacier city". The isolated natural environment here gives the town a quiet atmosphere and clean air, giving people a feeling of paradise.