Tallest! - GeekMom
My son was researching wonders of the modern world for an essay. He decided that Burj Khalifa, the world's tallest building, should be a modern wonder, saying it would stand tallest for a long, long time. I asked him to back that last statement up. What buildings were in construction that could top it soon?He started researching and we both had a great time exclaiming over the architecture, engineering, and incredible amount of money being spent all over the world to create enormous buildings.