Dubai is set to become home to the first temperature-controlled city on the planet. The ambitious project is expected to feature a mall, an indoor family theme park, and a network of temperature-controlled openable promenades — all billed as the worlds largest. According to developer Dubai Holding, the 7km (4.35 miles) expanse of covered walkways will allow week-long stays without the need for cars or exposure to Dubais harsh desert climate, which averages 104 degrees Farenheit in the summer. The objective is to create an integrated city with a plethora of best-in-class options within pleasant environments, said United Arab Emirates Prime Minister Sheikh Mohammed bin Rashid Al Maktoum in a statement. The Mall of the World might seem like an outlandish, capitalistic fantasy, but Dubai is no stranger to extravagance.