ADG Mountainsides specializes in the design and build of recreational mountainside attractions that create year-round destina ... tion settings for mountain resorts. All of their products and designs, from Indoor and Outdoor Mountainside Waterparks, to Mountain Coasters and Alpine Mountain Slides, have led to industry changing designs and technologies that have quickly become the new standard in mountain recreation. ADG’s products and can be found at top locations across North America, including Killington Mountain, Jay Peak, Purgatory, Copper Mtn, Camelback Mountain, Ober Gatlinburg, Branson, Massanutten and more. ADG Mountainsides is a division of Aquatic Development Group, Inc. read more