World records (buildings)

World largest shopping mall
South China Mall, Dongguan, China has 892,000 meter-square shops on 6 floors

World biggest office complex Chicago Merchandise Mart Illinois, USA

World tallest building
Burj Dubai is 900 meters high and completed in 2008

World biggest hotel MGM Grand Hotel Las Vegas has 6,276 rooms

World largest palace Palace of the Parliament Bucharest, Romania has more than 500 bedrooms, 55 kitchens, 120 sitting rooms