The highest round head on the right side of the picture below is the world's tallest residential building - Princess Tower, 107 stories high 413.36 meters, located in Dubai's bustling coastal area, costing 1.5 billion dirhams (about 25 . 8.6 billion yuan), is one of Dubai's landmark buildings, In 2012, it was officially recognized as the world’s tallest residential building by the Chicago-based international architectural research institute, the High-rise Building and Urban Residential Council, and set a Guinness World Records.