The Burj Khalifa is the most popular building in Dubai, United Arab Emirates. It is the tallest building in the world, reaching a height of 828 meters (2,717 feet). It has 163 floors that people can use.The building opened on January 4, 2010, and it took about 6 years to build. It was designed by architect Adrian Smith and built by a company called Emaar Properties.Inside the Burj Khalifa, there are offices, homes, a hotel, and restaurants. There is also an observation deck where people can go and see amazing views of Dubai.Fun Facts:It took over 22 million hours of work to build.The building can be seen from 60 miles (95 kilometers) away.It has 57 elevators and 8 escalators.Water from the air is collected and used to water the plants around it.The Burj Khalifa is a great place to visit and a symbol of how amazing architecture can be