Downtown Dubai, previously known as Downtown Burj Dubai, is a large-scale, mixed-use complex under development in Dubai, United Arab Emirates. It is the home of some of the city's largest landmarks including Burj Khalifa, Dubai Mall,[2] and Dubai Fountain. It covers an area of 2 square kilometres (0.77 sq mi), at an estimated cost of US$20 billion (Dh73 billion) upon completion.[3]