The Council on Tall Buildings and Urban Habitat, the nonprofit arbiter on tall building design, has named its 2014 picks for best tall buildings. Among the winners are a twisting tower in Dubai, Portland's greenest retrofit, and a veritable jungle of a high-rise. The four regional winners are: The Edith Green-Wendell Wyatt Federal Building, Portland, USA (Americas); One Central Park, Sydney, Australia (Asia & Australia); De Rotterdam, Rotterdam, Netherlands (Europe); and Cayan Tower, Dubai, UAE (Middle East & Africa). Portland’s Edith Green-Wendell Wyatt Federal Building is not a new building. Designed by SOM in 1974, the office tower used a pre-cast concrete façade that had begun to fail by the turn of the 21st century. Bainbridge Island, Washington-based Cutler Anderson Architects and local firm SERA modernized the 18-story, 512,474 square-foot structure that is now targeting LEED Platinum. One Central Park in Sydney uses hydroponics and heliostats to cultivate gardens and green walls throughout the tower, cooling the building and creating the world's tallest vertical garden. OMA’s De Rotterdam is the largest building in the Netherlands, and its form playfully morphs the glassy midcentury office high-rise in a way that’s part homage and part experimental deconstruction. In the Middle East, Dubai’s twisting Cayan Tower (formerly The Infinity Tower) is a 75-story luxury apartment building that turns 90 degrees over its 997-foot ascent. Remarked the CTBUH panel: “happening upon its dancing form in the skyline is like encountering a hula-hooper on a train full of gray flannel suits.” CTBUH will pick an overall “Best Tall Building Worldwide” winner at their 13th Annual Awards on November 6, at the Illinois Institute of Technology in Chicago. Their panel of judges includes Jeanne Gang, OMA’s David Gianotten, Laing O’Rourke’s David Scott, and Sir Terry Farrell, among others. OMA’s CCTV Tower in Beijing won last year’s competition. Most of the 88 contest entries were from Asia, CTBUH said, continuing that continent’s dominance of global supertall building construction. CTBUH's international conference will take place in Shanghai in September. You can find more about the 2014 CTBUH awards, including a full list of finalists, at their website.