Did you know that the Eiffel Tower in Paris, France was designed by Gustave Eiffel and completed in 1889 for the World's Fair? It stands at 1,063 feet tall and was the tallest man-made structure in the world until 1930. The tower is made of iron and weighs approximately 10,100 tons. Another iconic landmark is the Sydney Opera House in Australia, designed by Danish architect Jørn Utzon. This stunning building, with its unique sail-like roofs, was completed in 1973 and is known for its acoustic excellence. Did you know it took 14 years to build and cost over $102 million Australian dollars? Moving to the United States, the Golden Gate Bridge in San Francisco is a marvel of engineering. Completed in 1937, this suspension bridge spans the Golden Gate Strait and connects San Francisco to Marin County. It is over a mile long and is painted International Orange to increase visibility in the fog. Lastly, the Burj Khalifa in Dubai, United Arab Emirates is the tallest building in the world, standing at a staggering 2,717 feet. Designed by Adrian Smith, this architectural wonder was completed in 2010 and is a mix of traditional Islamic architecture and modern design. These landmarks are just a few examples of the incredible architecture and civil engineering feats that have shaped our world.