Swedish architect Ulf Mejergren is to install a temporary pavilion featuring a knotted rope roof in front of Toronto's City Hall, ahead of the Jewish festival of Sukkot next month. More about Ulf Mejergren to create tree-like pavilion made from rope for Jewish festival
Swiss childrenswear brand L'asticot has collaborated with architecture firm Bureau A to install a miniature cardboard city at its Geneva store (+ slideshow). More about Bureau A builds a model Soviet city inside L'asticot boutique
A group of students has completed a pair of transparent sculptural pavilions with the type of glass often used to cover smartphones (+ slideshow). More about Students turn lightweight smartphone glass into structural installations
A team of architects, artists and scientists has built a pair of basalt structures on the shoreline of a South Korean island to help to draw up fresh water from a spring below the sea. More about Volcanic stone structures pump fresh water from the sea surrounding a South Korean island
Ill-Studio has collaborated with French fashion brand Pigalle to create a multicoloured basketball court between a row of buildings in the 9th arrondissement of Paris (+ slideshow). More about Pigalle Duperré is a colourful basketball court tucked between a row of Parisian apartments
Pomo summer: design collective Fontaine/Fortin/Labelle has blocked both ends of a lane in Quebec's Quartier Création with a Postmodern-influenced installation of colourful walls and geometric doorways (+ slideshow). More about Fontaine/Fortin/Labelle creates Pomo-inspired entrance to Quebec passageway
Bblur Architecture has won approval to wrap a giant slide around the Anish Kapoor-designed ArcelorMittal Orbit sculpture in London's Queen Elizabeth Olympic Park. More about "World's longest and tallest tunnel slide" to wrap Anish Kapoor sculpture in London's Olympic park
Crystal-covered strands in London designer Elaine Yan Ling Ng's Design Miami/Basel installation respond to movement nearby by curling and twisting, as shown in this movie filmed by Dezeen (+ movie). More about Elaine Yan Ling Ng's interactive Sundew installation coils in response to movement
This wooden pathway installed over the Fonte Luminosa fountain in Lisbon enables visitors to get close enough to the cascading water to be soaked by its spray (+ movie). More about Marcelo Dantas installs temporary walkway over Lisbon's Fonte Luminosa fountain
A kilometre of steel corridors are wound within this industrial-looking maze at a former coal mine by Belgian studio Gijs Van Vaerenbergh (+ slideshow). More about Gijs Van Vaerenbergh's steel maze features spherical, cylindrical and cone-shaped voids
Four young studios have created installations for Design Biennial Boston, an event that aims to provoke more "architectural imagination" throughout the city (+ slideshow). More about Four emerging firms create installations for Design Biennial Boston
Installations formed by blending coloured lights, and a lamp based on jellyfish were produced by Dutch designer Dennis Parren for the Biennale Internationale Design Saint-Etienne 2015 (+ movie). More about Dennis Parren creates colourful lighting installations for Saint-Etienne design biennial
A root system sprouts from the concrete foundations of this house installation that dangles from a crane above a construction site in Germany. More about Roots trail from house suspended above a construction site by Leandro Erlich
A sculpture and landscape intervention on the Norwegian island of Utøya has opened to mark the fourth anniversary of a terrorist attack that killed 69 people (+ slideshow). More about 3RW's memorial for victims of Norwegian massacre opens on Utøya island
Studio Echelman has used more than 100 miles of rope to create a sculpture that floats high above a Boston park (+ slideshow). More about Janet Echelman creates aerial rope sculpture made of super-strength fibres
An installation of more than two million translucent straws provides the setting for a retrospective exhibition of work by Japanese designer Tokujin Yoshioka (+ slideshow). More about Tokujin Yoshioka uses millions of straws to recreate Tornado installation in Japan
Brooklyn studio Snarkitecture has transformed the grand hall of the National Building Museum in Washington DC into a "beach" featuring a sea of translucent balls and a shoreline dotted with lounge chairs and umbrellas (+ slideshow). More about Snarkitecture fills Washington DC museum with nearly one million plastic balls
The research arm of Dutch studio OMA created a 1990s-style nightclub in Paris to host a one-off event for fashion brand Miu Miu (+ slideshow). More about AMO designs pop-up Miu Miu Club for fashion event in Paris
Ceramic triangular prisms are arranged as staggered peaks to form this public installation by Istanbul studio SO? Architecture and Ideas outside London's Royal Academy of Arts (+ slideshow). More about Unexpected Hill provides seating and climbing opportunities at the Royal Academy of Arts
London studio NEON has built a structure with shingles that "shiver" and adapt in response to changing weather as part of an exhibition in Finland (+ movie). More about Shiver House's plastic shingles change shape to create a shelter in bad weather