Did you know that the Burj Khalifa in Dubai, UAE, is the tallest man-made structure in the world, standing at a staggering height of 2,717 feet? This architectural marvel also holds the record for the tallest freestanding structure and the building with the highest number of stories. Another iconic landmark is the Eiffel Tower in Paris, France, which was designed by Gustave Eiffel for the 1889 World's Fair. Despite initial criticism, the tower has become a symbol of France and is one of the most visited monuments in the world. The Sydney Opera House in Australia is known for its distinctive sail-like design, which was created by Danish architect Jorn Utzon. It took 14 years to build and has become a UNESCO World Heritage Site. In the United States, the Empire State Building in New York City is a prime example of Art Deco architecture. Standing at 1,454 feet, this skyscraper was the tallest building in the world for nearly 40 years after its completion in 1931. Lastly, the Great Wall of China is a monumental feat of engineering that stretches over 13,000 miles. Built over centuries to protect China from invaders, it remains one of the most impressive man-made structures in the world.