Standing at 828 meters (2716 feet) , Burj Khalifa in Dubai, United Arab Emirates is undoubtedly the tallest building in the world. With a staggering 160 floors , it boasts one of the highest outdoor observation decks which are located on the 124th , 125th & 148th floors. For better deals purchase tickets online in advance.. The World’s highest restaurant , Atmosphere is located on the 122nd floor. Visit the Dubai dancing fountain and the World’s largest mall , the Dubai Mall which is next to the Burj Khalifa. Visit Dubai to witness a modern marvel in Burj Khalifa.