MCLEAN, Va.–(BUSINESS WIRE)–2017 was a monumental year for DoubleTree by Hilton, one of Hilton’s (NYSE: HLT) 14 market-leading brands, surpassing 500 hotels worldwide and introducing 30+ new hotels to guests around the world. To close out the year, the brand recently welcomed an additional three hotels to its portfolio. With convenient locations, inspired design and thoughtful upscale amenities, these hotels are now delivering unparalleled hospitality to guests and visitors, all starting with