In an effort to curate a spectrum of ideas—inspirational, provocative, futuristic—that transforms Dry Dock No. 4 into a signature park, ArchitectureBoston invited a range of firms and artists to the drawing board to imagine the possibilities. GRAY - BLUE - GREEN is a public park that contrasts the microcosms of urban, coastal and pastoral landscapes. The basin and piers of the existing dry dock organize the landscapes into bands that uniquely play with the visitors’ relationship to the horizon and waterline. The gray band is at city level and connects to the neighborhood’s sidewalks and streets. The blue band utilizes the depth of the former dry dock to lower visitors below sea level and immerse them in the space. The green band creates constructed drumlins that provide elevated prospects over the site, the harbor, and back to the city. Opportunities for passive and active recreation are interspersed throughout each band, creating new opportunities for life on the harbor.