“I think you'll be asking different questions in 50 years,” the engineer behind the world's tallest building told Newsweek.
The unique form of the world's tallest building is "a very efficient way to maximize stability," its engineer told Newsweek.
Antoni Gaudí was known as "God's architect", and the centuries-old arch design he drew on for Barcelona's Sagrada Família helps it soar higher than any other church in the world.