Danish architecture studio CEBRA has revealed a proposal for a snowflake-shaped ski dome that would be the biggest in the world, with three kilometres of slopes arching over a river in the Danish city of Randers. More about Skidome Denmark by CEBRA
Stray balls aren't a problem on the rooftop tennis court of this sports centre in western Poland by PL.architekci, thanks to the cage that covers the building (+ slideshow). More about Fala Park by PL.architekci
This library by London architects Studio Egret West looks like a row of books (+ slideshow). More about Clapham Library by Studio Egret West
Slideshow: Spain's economy may be in tatters but that hasn't stopped it opening a raft of impressive public buildings in towns, cities and even remote villages over the past year. Amid bailouts and claims that extravagant architectural projects have helped cause the problems, here's a celebration of more modest projects from Spain such as museums, town halls, markets, auditoriums, bridges and even railway control centres featured on Dezeen recently. More about Special feature: Spanish public architecture
Madrid studios Mi5 Arquitectos and PKMN Architectures have built a half-submerged culture and leisure centre in the middle of a public square in Teruel, Spain (+ slideshow). More about Teruel-zilla! by Mi5 Arquitectos, and PKMN Architectures
Architects TYIN Tegnestue of Norway have taken an empty slot in a dense residential area of Bangkok and worked with the local community to build a climbing frame and basketball court. More about Klong Toey Community Lantern by TYIN Tegnestue
Slideshow: London studio Peter Barber Architects has completed a centre for drug and alcohol rehabilitation in Ilford, northeast London. More about Redbridge Welcome Centre by Peter Barber Architects
Slideshow: French studio Bang Architectes has converted a former peanut factory in Calais into a skateboarding park with a bright orange mesh facade (photos by Julien Lanoo). More about Zap' Ados by Bang Architectes
Following their Eurovision Song Contest win last summer, Azerbaijan rushed to commission German firm GMP Architekten to design a new stadium that will be complete in time to host this year’s competition. More about Sports Concert Complex by GMP Architekten
French architects Agence Search have completed a water-sports centre beside the Seine with a roof of undulating waves. More about The Mantes-la-Jolie Water Sports Centre by Agence Search
Brightly coloured and patterned panels chosen by different groups in the local community adorn a new library and learning centre in Melbourne, Australia. More about Avondale Heights Library & Learning Centreby H2o Architects
Tread-like indents in the concrete facade of this rock-climbing centre might encourage visitors to scale the walls (photos by Julien Lanoo). More about Le Polyèdre by Béal and Blanckaert
Criss-crossing metal beams surround a first floor reading room at a multimedia library near Paris. More about Médiathèque Romain Rolland by Philippe Gazeau
A ring of mesh thorns crowns the roof of this convention centre in Zlín, Czech Republic, by London studio Eva Jiricna Architects and Prague architects A.I Design s.r.o. More about Convention Centre by Eva Jiricna Architects and A.I Design s.r.o.
A steel shell curls over the arched frame of this sports hall near Sydney by Australian architects Allen Jack+Cottier. More about Milson Island Sports Hall by Allen Jack+Cottier
Visitors can climb a staircase over the roof of this spiralling community centre in Lille by French architects Colboc Franzen & Associés. More about Neighbourhood Centre by Colboc Franzen & Associés
Paris landscape designers TN Plus and architects Beckmann N’Thépe have won a competition to design a zoological park on a series of artificial islands for the outskirts of St Petersburg. More about Zoological Park of St Petersburg by TN Plus and Beckmann-N'Thépé
This former bullring in Barcelona has been converted into a leisure complex by architects Rogers Stirk Harbour + Partners, retaining the original facade. More about Las Arenas by Rogers Stirk Harbour + Partners
This pavilion with illuminated eaves was designed by Dutch firm MoederscheimMoonen Architects for two football teams in Rotterdam. More about Sports Pavillion by MoederscheimMoonen
French designer Philippe Starck has completed the renovation of a former wine cellar in Bilbao to create a new culture and leisure centre for the city. More about Alhóndiga Cultural and Leisure Center by Philippe Starck