Three designers from the Canadian firm Groupe A / Annexe U have erected an orange pavilion within a shallow pool, requiring visitors to don waterproof shoes to explore the structure's interior (+ slideshow). More about Visitors must wear rain boots to explore Get Wet installation at Quebec garden festival
A new installation by Boston-based architecture studio Matter Design features a wooden box with sculptural interior walls that radiate different temperatures, creating an "intimate and contradictory set of experiences". More about Matter Design's Microtherme conceals voluptuous concrete forms within a wooden box
London Design Festival 2015: London artist Barnaby Barford has stacked 3,000 tiny shops made from bone china into a version of the biblical Tower of Babel at the V&A museum (+ slideshow). More about Barnaby Barford's Tower of Babel comprises 3,000 tiny ceramic shops
Designer Daan Roosegaarde has installed the "largest smog vacuum cleaner in the world" in Rotterdam to help improve the city's air quality (+ movie). More about Daan Roosegaarde's Smog Free Tower opens in Rotterdam
London Design Festival 2015: Norwegian design studio Kneip has created a set of four functional sculptures that measure and report on weather conditions (+ movie). More about Kneip designs Weathered series of sculptural atmospheric sensors
London Design Festival 2015: an exhibition by Swedish gardening house Coloni and trend forecaster Studio Aikieu will celebrate the potential of "undesirable" and wild-growing species in towns and cities. More about Coloni and Studio Aikieu celebrate weeds with Plants Out Of Place exhibition
Visitors to an Innsbruck gallery can crawl from room to room via a series of bouncy net tunnels installed by design collective Numen/For Use. More about Tube net installation by Numen/For Use designed as a "giant convulsing centipede"
French artist Charles Pétillon has installed a giant cloud of balloons under the roof of the 19th-century Market Building in London's Covent Garden (+ movie). More about Charles Pétillon fills Covent Garden market with 100,000 white balloons
Dutch studio Atelier Van Lieshout has unveiled its largest installation to date: a giant art village at the Ruhrtriennale arts festival in west Germany (+ slideshow). More about Atelier Van Lieshout takes over German festival with The Good, The Bad and The Ugly installation
Design Academy Eindhoven graduate Manon van Hoeckel is crowdfunding her In Limbo Embassy – a travelling office that aims to facilitate open discussion around immigration in the Netherlands. More about Manon van Hoeckel creates "neutral" travelling embassy for undocumented migrants
Zaha Hadid has created a swooping canopy for New York's High Line – in an area of the elevated park abutting the construction site for a building designed by the architect. More about Zaha Hadid's High Line installation protects park visitors from construction debris
Austrian arts collective Neon Golden has created an immersive light installation that mimics the movements of fireflies (+ slideshow). More about Neon Golden replicates swarm of fireflies with light installation
Students from the Institute of Architecture and Design Chihuahua have used scaffolding, wood and fabric to turn a disused park fountain into a shaded urban spa for local residents (+ slideshow). More about Students use scaffolding to build Urban Spa in a Mexican park
Zurich citizens can now relieve themselves at a pink marble public pissoir, installed at an open-air car park by local architecture firm Bureau A (+ slideshow). More about Bureau A installs pink marble urinal at Zurich car park
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