The Archgroup Consultants-designed JW Marriott Marquis Dubai hotel has now opened for business in the United Arab Emirates. At 355m in height, the opulent business hotel holds the title of the tallest hotel in the world although international provider of building data Emporis has released a report which highlights the Ritz-Carlton in Hong Kong by Kohn Pedersen Fox as the 484m-tall tower which offers the highest beds in the world on the 117th floor of 118.