Danish architecture studio BIG has revealed its masterplan for Pittsburgh's Lower Hill District, featuring sloped-roof buildings and an extensive network of pathways (+ slideshow). More about BIG unveils design for urban neighbourhood on site of former Pittsburgh hockey arena
Toronto has revealed plans to construct a new park below an elevated highway, featuring outdoor performance spaces and a pedestrian and cycle trail. More about Plans unveiled for Toronto park that will stretch under a highway
Dutch architecture studio MVRDV is to replace a flooded shopping centre in the Taiwanese city Tainan with a lagoon to create a "hip urban pool" and artificial beach (+ slideshow). More about MVRDV unveils plans for sunken lagoon park in Taiwan
Architecture studio Penda has designed a meadow containing sunken pathways and concealed meeting places, which opens next month as part of China's International Garden Expo 2015. More about Penda highlights global water crisis with meadow pathway installation
Landscape firm Gustafson Porter has unveiled plans to create tiered gardens and waterfalls with a towering development proposed for Singapore's Marina Bay. More about Verdant "cloud forests" and waterfalls proposed for new Singapore high-rise
A new mock-up of the Lowline, the underground park planned for New York City, demonstrates how its designers will bring sunlight and plant life below the streets of Manhattan's Lower East Side (+ slideshow). More about Lowline Lab demonstrates viability of an underground New York park
Danish office CF Møller has completed its transformation of a waterfront promenade in Aalborg, as part of a wider regeneration of the port city in northern Denmark (+ slideshow). More about CF Møller creates dune-inspired promenade and landscaping on Aalborg waterfront
Architecture studio Penda has unveiled new CGI renderings detailing its vision for a city of 200,000 people that would be creating using an innovative modular bamboo structure. More about Penda unveils vision for bamboo city made from interlocking modular components
Opinion: Chicago may have been the birthplace of the modern skyscraper, but the city is now more interested in landscape projects that make New York's High Line look like small fry, says Jonathan D Solomon, director of architecture at the School of the Art Institute of Chicago. More about "Chicago is a living laboratory of future infrastructure"
Chicago Architecture Biennial 2015: US firm Aranda\Lasch has unveiled plans for an art park for a Chinese-Indonesian philanthropist, proposed on terraced rice paddies in the Bali countryside (+ slideshow). More about Aranda\Lasch presents art park designs for sensitive ecological site in Bali
Bridges and paths supported by pointed towers made from pre-rusted steel tubes form a walkway that allows visitors to wander among the treetops of the Adirondack Park in Upstate New York (+ slideshow). More about Wild Walk is a treetop trail that rises above a forest in Upstate New York
Dutch garden designer Piet Oudolf, known for large public projects like New York's High Line, has completed a project much smaller in scale: a private terrace for an apartment building in the city. More about Piet Oudolf creates rooftop garden for New York condo building
Architect Rafael Viñoly has unveiled plans to convert an ageing shopping centre in California's Silicon Valley into a vast development featuring the world's largest roof garden (+ slideshow). More about Rafael Viñoly reveals plans for the "largest green roof in the world" in Silicon Valley
A Southern California landscape architect is questioning why Frank Gehry was chosen to lead the masterplanning effort for the Los Angeles River redevelopment, citing a lack of expertise and public input. More about Gehry's selection as LA River masterplanner sparks criticism
Pomo summer: the Piazza d'Italia in New Orleans, designed by Charles Moore, is one of the few icons of Postmodern architecture that isn't a building, and is next in our summer season on Postmodernism. More about Postmodern architecture: Piazza d'Italia, New Orleans by Charles Moore
Fernando Romero and two other Mexican architects have unveiled plans to transform Mexico City's Avenida Chapultepec into a public park featuring trees, cafe plazas, a raised promenade and water features. More about Mexican architects to create public park in the centre of a busy Mexico City road
Boston studio Höweler + Yoon has stitched together steel modules to form a faceted canopy that shades an urban pocket park in the desert city of Phoenix, Arizona (+ slideshow). More about Höweler + Yoon creates canopy of folded metal plates for urban park in Phoenix
James Corner Field Operations – one of the studios behind New York's popular High Line – has designed a new park for downtown Miami that would be constructed beneath an elevated rail line (+ slideshow). More about Underline park by James Corner Field Operations would stretch below elevated rail tracks in Miami
Architect Frank Gehry is designing a masterplan for the revitalisation of the Los Angeles River, a barren canal-like waterway that weaves through the California city. More about Frank Gehry revealed as designer of masterplan for LA River
Vietnamese office MIA Design Studio has transformed a polluted lake in the city of Qui Nhon into a scenic visitor attraction, with the addition of a waterside park that conceals a new sewage system (+ slideshow). More about Waterside park by MIA Design Studio runs alongside a lake in Vietnam