When the Empire State Building was constructed in 1931, it stood 1,250 feet tall. The famous skyscraper was the world's tallest building — and held that title for more than 40 years.
Today the world's tallest building is the Burj Khalifa in Dubai. It stretches more than 1,000 feet above the Empire State Building — 2,717 feet into the air. The Burj Khalifa smashed the record held by Taiwan's Taipei 101, a landmark skyscraper with 101 floors. And at 1,666-feet, Taipei 101 tops the Petronas Towers in Kuala Lumpur by 183 feet.