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The last spike in the Transcontinental Railroad is put into place and is the First Transcontinental Railroad.
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The Hoover Dam opens in the Colorado River and is 220 acres.
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The Golden Gate Bridge opens and it was 4,200 feet long, holding a world record for the longest suspension bridge for 27 years.
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The construction of the Interstate Highway System starts because of Dwight D. Eisenhower and is still being added onto today.
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The Channel Tunnel, and underwater tunnel connecting the UK and France is finished being built.
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The ISS (International Space Station) is launched into orbit and is the biggest space station ever built.
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King Fahd International Airport opens and is anncouned world's biggest airport by Guinness World Records.
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The Eden Project is a collection of "artificial biomes" in Cornwall, UK. It consists of 8 combined domes and is amazingly realistic.
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Taipei 101 opens in Taipei, Taiwan and has served as the symbol of modern Taiwan.
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Built in Russia, this structure took 15 years to be fully constructed, reaches 13 stories high, and held the record for the world's tallest wooden building. Sadly in 2008, it was condemned by the city of Arkhangelsk and was torn down to 4 stories. In 2012, the building caught fire and burned to the ground.
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The Burj Khalifa opens in Dubai, standing as the tallest man-made structure in the world.
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The Jinping-l is opened in china and is the biggest hydroelectric dam in the world.
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The construction of the Kingdom Tower would cost $20 billion USD and would stand at 1,000 m (0.621371 Miles). It's estimated completion is 2019 and will be the next world's tallest building.
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The Freedom Tower opens with 104 floors and acts as the new World Trade Center.
