In high populated cities, land prices have paved the concept of vertical mall, where the allocation for retail business is configured in many floors, whereas the different levels of the mall are added by the elevator and / or escalator . The challenge with this type of mall is to deal with the instinctive trends of shoppers being horizontally established and to encourage shoppers to move up and down. [19] The concept of vertical mall was originally used in the 1960s as Marshall Field & Co. The past shopping center development division of Mafco Company. The Water Tower Place was built in 1975 by Urban Retail Properties, a skyscraper in Chicago, Illinois. A hotel in it,[ Add quotation ]Vertical mall is common in suburban groups with densely populated populations like Hong Kong and Bangkok. Times Square is a prime example in Hong Kong. [19]Fashion Center in Pentagon City of Arlington, Virginia, USAVertical malls can also be built in places where the geographical position prevents buildings from moving beyond buildings or there are other restrictions on construction, such as historical buildings or important archeology. Shrewsbury, Darwin Shopping Center and the associated mall in Britain are built beside the outer walls of the nearby medieval castle, [20] beside the steep hillside ; As a result, the shopping center is divided directly into seven floors-two places in the plane-linked by elevator, escalator and bridge routes. [21] Some establishments include such designs in their layout, such as Shrewsburys McDonalds restaurant, divided into four floors with many intermediate floors, in which the medieval castle has basement - full of arrows cracking - in the basement dining room .@@