US designers Yitan Sun and Jianshi Wu have proposed transforming Manhattan's Central Park into a sunken landscape encircled by a below-grade megastructure with office, housing, retail and cultural space. More about Sunken "sidescraper" bordering New York's Central Park wins skyscraper competition
Seattle firm Olson Kundig Architects has won first place in a competition to create an architectural fairytale, with its story about a dead architect who is resurrected and dropped into a futuristic urban landscape. More about Eerie sci-fi story by Olson Kundig wins architecture fairytale competition
London firm Rogers Stirk Harbour + Partners has revealed details of a concept for a bamboo-framed vertical farm that could provide an alternative to traditional land-intensive farming. More about Rogers Stirk Harbour tackles global food crisis with vertical farm concept
A mature fir tree would be enclosed at the centre of this conceptual tubular glass house by Kazakh architect Aibek Almassov, which may finally become a reality now that potential investors have been found (+ slideshow). More about Tubular glass house by Aibek Almassov could be built around a full-grown tree
US-based firm Kohn Pedersen Fox has envisioned a new district in Tokyo that includes a mile-high skyscraper and infrastructure elements that will protect the city from natural disasters (+ slideshow). More about KPF conceives futuristic new city quarter for archipelago in Tokyo Bay
A disused grain silo in Malmö is converted into a crematorium and "vertical cemetery" in this proposal by Swedish architecture students Fredrik Thornström and Karolina Pajnowska. More about Lund University students envision Malmö silo transformed into a crematorium
A sliding screen can reveal or conceal a glass office that cantilevers from the concave face of this concept house by American studio Fixd Architecture/Design (+ slideshow). More about Retractable sunscreen sheaths glazed cantilever at Ventus House
Seattle-based designer Katrina Spade has developed a building proposal that offers an eco-friendly alternative to burying or cremating loved ones. More about Katrina Spade's Urban Death Project proposes a composting facility for dead bodies
Spanish architect Alberto Villanueva's Mars Utopia concept would see the planet transformed into an inhabitable environment using towers formed by bacteria (+ slideshow). More about Architect proposes Mars Utopia towers to terraform red planet into breathable environment
Belgian architect Vincent Callebaut has developed plans for a city of futuristic ocean buildings made from 3D-printed plastic waste which extend 1,000 metres below the water's surface (+ slideshow). More about Vincent Callebaut proposes underwater "oceanscrapers" made from 3D-printed rubbish
LA-based architect Clive Wilkinson has drawn up conceptual plans for a giant shared office that would hover above London, enabling people to simply walk upstairs to their mobile workplace. More about Clive Wilkinson suggests "carpet bombing" London with a co-working office in the sky
Architecture office NBBJ has unveiled a concept for a series of natural ice rinks on London's River Thames that emerge from below the water's surface. More about Flower-like ice rinks proposed for London's River Thames
The super rich can commission a bespoke home the same way they buy a luxury yacht using the Superhouse brand, according to founder Magnus Ström (+ 360-degree render). More about Ström Architects applies superyacht concept to luxury housing with Superhouse
Chilean architects Mauricio Pezo and Sofia von Ellrichshausen are presenting a concept for a megastructure built from 100 overlapping circular enclosures, as part of an exhibition in the Czech Republic (+ slideshow). More about Pezo von Ellrichshausen designs a building made up of 100 circles
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
Parasitic apartments blocks over fire stations and starter homes floating on waterways are among the 10 winning designs in a New London Architecture competition to find solutions to London's housing shortage (+ slideshow). More about NLA unveils 10 winning designs in ideas competition addressing London's housing crisis
Chicago Architecture Biennial 2015: WORKac has teamed up with the founders of 1970s art collective Ant Farm to design a floating city based on drawings that were lost during a fire decades ago (+ slideshow). More about WORKac and Ant Farm design a utopian floating city for humans and marine animals
NASA – the US space agency that announced the discovery of flowing water on Mars this week – has chosen a winner in its contest to design proposals for 3D-printed housing on the red planet (+ slideshow). More about 3D-printed Ice House by Clouds AO and SEArch wins NASA Mars Habitat contest
A vision of a blazing bridge has won a tongue-in-cheek competition seeking "alternative but equally ridiculous" design proposals that could replace Thomas Heatherwick's much maligned Garden Bridge for London. More about Eternal bonfire on the River Thames wins satirical contest to rival Heatherwick's Garden Bridge
Following its design of the UK's "first amphibious house", Baca Architects has unveiled a floating house concept that could be deployed across London's waterways as a solution to the lack of new homes in the capital (+ slideshow). More about Baca Architects proposes prefabricated amphibious housing for London's canals