The 17th annual world bodypainting festival has taken place in Pörtschach, Austria. Thousands of visitors arrived to observe the bodypainting work of artists from 47 different countries on the theme of Pop Art.

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Photos: Jan Hetfleisch/Getty Images

What is London’s $300m garden bridge for? 

Take one voguish designer, one national treasure and one icon-hungry mayor and what do you get? A floating forest across the Thames. We interviewed its designer

Image: Arup

Emma Hack, a body illustrator, is famed for her work on Gotye’s hit music video last year is bringing her latest collection of work to life in front of an audience at the Blossom exhibition at Rebecca Hossack Art Gallery

See more from the collection here

Photo: Emma Hack / Barcroft Media

Take a tour of the projects vying this year for Riba’s Stirling prize, which recognises the best of British architecture - in pictures

Above: The circular balcony of the rotunda at Tate Britain, London, by Caruso St John Architects. Photo: Ray Tang/REX

The glass fronted house so memorably destroyed in a moment of teenage rebellion in the cult 1986 comedy Ferris Bueller’s Day Off has been sold for $1.06m (£632,000), according to Variety. More here

The city is fast becoming China’s city of clones. Boasting 56 famous replica bridges as well as Venetian- and Dutch-style villages, the Chinese city of Suzhou is the home of ‘duplitecture’. But what’s driving this passion for urban mimicry?

Photo: Michael Silk

Stepping on to the glass deck that hangs off the Willis Tower, Chicago’s tallest building, is already a thrilling – and terrifying – experience for tourists, but one California family had a scare this week when the glass appeared to crack underneath their feet. Read more 

Photograph: Alamy

The architecture of the river Thames – in pictures

London is a city divided by the Thames, but united by its bridges, which allow people to navigate the city. An exhibition at theMuseum of London Docklands displays rare archive photographs. See more photos

The Houses of Parliament and Big Ben taken from the south side of the River Thames near Westminster bridge in 1965. Photograph: Henry Grant

Echoes of atrocity: the 9/11 Memorial Museum – in pictures

The Memorial Museum, by Norwegian architects Snøhetta, has eerie echoes of a falling twin tower. Two giant, fire-charred columns rise up like fists in the entrance hall, leading visitors down to an emotional underworld of architectural salvage. More photos »

Photographs: Jeff Goldberg/Esto