American firms Rogers Partners and Nelson Byrd Waltz have conceived a raised, tree-lined park for Atlanta, Georgia, that would be built atop rail tracks and a busy roadway (+ slideshow). More about Elevated urban park in Atlanta would stretch over a rail line and highway
Thomas Heatherwick has defended his Garden Bridge proposal for London's River Thames, after a BBC report found that the project was missing £22 million in funding. More about Heatherwick defends Garden Bridge as investigation reveals £22 million funding gap
A proposal to add a giant curvaceous greenhouse on top of the pavilion designed by Philip Johnson for the 1964-65 World's Fair has won a competition to suggest uses for the abandoned structure. More about Architects imagine new uses for Philip Johnson's New York State Pavilion
Rio 2016: a 2.5 million-square-metre area west of Rio de Janeiro has been transformed by Brazilian firm Vigliecca & Associados into one of two major locations during the city's Olympic and Paralympic games (+ slideshow). More about Deodoro Olympic Park will host multiple sporting events during the Rio 2016 games
New York's City Hall has given the go-ahead for the Lowline underground park, which aims to emulate the success of the city's elevated High Line (+ slideshow). More about New York gives thumbs up to subterreanean Lowline park
Landscape architecture firm West 8 has added rolling hills with playgrounds and art installations across Governors Island in New York harbour (+ slideshow). More about West 8 creates artificial hills on New York's Governors Island
Italian architect Renzo Piano has finished a major new park, library and theatre complex in Athens, following one of the largest donations for a cultural building project in history (+ slideshow). More about Renzo Piano completes Stavros Niarchos Foundation Cultural Center on a huge artificial hill
The City of Los Angeles has chosen a design by OMA and landscape architects Mia Lehrer + Associates to transform a site in the Downtown area into a public park (+ slideshow). More about OMA's team wins FAB Park competition for Downtown LA
The design features of Indian stepwells and water mazes are combined in this proposal for a landscaped garden by architecture studio Penda (+ slideshow). More about Penda combines stepwells with water mazes for Indian garden design
British designer Thomas Heatherwick's elevated park over the Hudson River has been given the go ahead by planners and will start construction this summer. More about Heatherwick's Pier 55 to begin construction over New York's Hudson River
Tropical, desert and aquatic plants will be housed in a trio of domed glass greenhouses at the centre of these botanical gardens planned by Austrian firm Delugan Meissl Associated Architects for Taiyuan, China. More about Domed greenhouses form heart of botanic garden design by Delugan Meissl
The four competing proposals for the revamp of LA's Pershing Square have been finalised and revealed, by designers including Morphosis and James Corner Field Operations (+ slideshow). More about Four competing designs unveiled for Pershing Square in downtown Los Angeles
Architecture firm OMA is one of four firms shortlisted to design the FAB Civic Center Park in Los Angeles, with a proposal that includes mirrored canopies and shaded bleacher seating under a cantilevered cafe (+ slideshow). More about OMA unveils "new type of park space" for Los Angeles' FAB Civic Center competition
TAKA has completed St Patrick's Park Tearooms, a cafe with bright green window frames that is located beneath the brick arches of a Dublin park originally commissioned by the Guinness family (+ slideshow). More about TAKA slots tearooms and toilets beneath brick arches in Dublin's St Patrick's Park
Italian architect Carlo Ratti has unveiled plans to build a mile-high observation tower, envisioned as a vertical alternative to New York's Central Park. More about Carlo Ratti designs mile-high observation tower with a park on top
Dutch landscape firm West 8 has masterplanned a new botanical garden in Houston, Texas, featuring a mosaic of gardens and a bridge incorporating an arch of trees. More about West 8 plans botanical garden for Houston featuring an arching tree bridge
Movie: gallery director Julia Peyton-Jones reflects on the walled garden Peter Zumthor created in 2011 in the next movie of our exclusive video series looking back at the Serpentine Gallery Pavilions. More about Peter Zumthor's Serpentine Gallery Pavilion 2011 was a space of "solitude and calm"
A park consisting of towering hills designed by Dutch landscape firm West 8 will open this summer on Governors Island, offering sweeping views of the New York Harbor and the city skyline. More about The Hills by West 8 opening summer 2016 on New York's Governors Island
Japanese firm Nikken Sekkei has been chosen to transform a 24-kilometre-long stretch of disused Singapore railway into a High Line-esque park that extends across the entire island (+ slideshow). More about Singapore's answer to the High Line could stretch across the entire island
Architecture studio Morphosis and landscape architect James Corner Field Operations are among the four teams that have been shortlisted to redesign one of Los Angeles' oldest public parks. More about Four finalists announced for revamp of Pershing Square in downtown LA