The Eiffel Tower is located on the Champ de Mars in Paris, France, next to the Seine River. It was built to hold the 1889 World Expo after the French government conducted a construction tender, and it became the tallest building in the world at that time.

Construction began on January 26, 1887, and was completed on March 31, 1889.

Despite the controversy surrounding its construction, due to concerns about its architectural style being unsuitable for the historic city of Paris, and the technical challenges of building such a tall structure at the time, the Eiffel Tower has become a beloved landmark of the city, appreciated for its unique charm and beauty.

The tower's structure is surprisingly light, with an equivalent density of only 7 to 8 times that of the surrounding air if it is regarded as a solid structure. The integration of stairs and elevators into the overall structure according to the line shape of the main structure gives the tower a seamless appearance without any additional rigidity.

The best time to visit the Eiffel Tower is during May, June, September, and October, as the weather is comfortable, the hours of sunshine are long, and there are fewer crowds.

However, summer in Paris is also a popular time for social events, such as music festivals, outdoor dining, and cultural events, making it a popular destination for travelers of all ages.

Aside from its role as a symbol of Paris and French culture, the Eiffel Tower serves several other functions. At the top of the tower is a science laboratory established by French physicist Jean Pavlov, which was once an important location for various physical experiments and meteorological research.

The three observation decks of the Eiffel Tower offer breathtaking views of the city of Paris, including the tower itself, the Seine River, and various famous buildings in downtown Paris.

It is also frequently used for entertainment purposes, such as concerts, fireworks displays, and cultural events held in the Champ de Mars Park around the tower, attracting thousands of spectators.

The design and construction of the Eiffel Tower are considered a milestone in engineering and architectural design, using innovative materials and techniques, such as iron rods and rivets, that were considered cutting-edge at the time.

The tower also utilized many scientific calculation and analysis methods during its construction, making it a symbol of engineering achievement.

It stands as a technological masterpiece in the history of world architecture and held the title of the tallest building in the world for 45 years.

In summary, the Eiffel Tower is a historically and architecturally significant building, representing the pinnacle of engineering and architectural design. It serves as an important symbol of French culture, and its unique charm and beauty continue to draw visitors from around the world.