As of my last update in September 2021, it is challenging to provide the top 3 buildings since new constructions and rankings might have emerged since then. However, based on the information available up to that point, the following three buildings were among the most notable and iconic:
Burj Khalifa, Dubai, UAE: The Burj Khalifa is the tallest building in the world, soaring to a height of 828 meters (2,717 feet) with 163 floors. It was completed in 2010 and is an engineering marvel, showcasing breathtaking architecture and design.
Shanghai Tower, Shanghai, China: The Shanghai Tower is the second-tallest building globally, standing at 632 meters (2,073 feet) and featuring 128 floors. Completed in 2015, it is a symbol of modern Chinese architecture and sustainable building practices.
One World Trade Center, New York City, USA: Also known as the Freedom Tower, One World Trade Center was constructed to replace the original World Trade Center towers destroyed in the September 11, 2001, terrorist attacks. It stands at a symbolic height of 1,776 feet (541 meters) with 104 floors and was completed in 2013.
Please note that this list might be outdated, and there could be new skyscrapers or significant buildings completed after my last update. I recommend checking more recent sources for the latest information on iconic buildings.