Dubai is an emirate located in the United Arab Emirates. It has a tropical desert climate with hot days around 42°C and warmer nights of 28°C. Some of the top attractions in Dubai include the Burj Khalifa, the world's tallest building; Palm Islands, three large artificial islands in the shape of palm trees; and Dubai Mall, one of the largest malls in the world. The official language is Arabic, but English is also widely spoken.