Secret oasis: the artist who’s hidden a swimming pool in the desert

Alfredo Barsuglia has put a swimming pool deep in the Mojave desert, which you need a treasure map to find. It’s a perfect parody of our world of instant gratification

Miró spirit flies free again from Mallorca vaults

Eleven unseen works in exhibition of contrasts bring new insights into Spanish master of fluidity

Kazimir Malevich: the man who liberated painting

Malevich’s Black Square was an emptying out of all the value associated with art. Ahead of a new Tate Modern show, Frances Spalding explores the work of a revolutionary painter

Museum of the Year 2014: what makes a winner?

Artist Tracey Emin, historian David Starkey, designer Margaret Howell and others champion their favourite exhibition space

Radical geometry: South America’s surprising art

All eyes are on Brazil’s World Cup but a new Royal Academy exhibition showcases a different kind of South American artistry, and makes a stunning case for the continent’s geometric art

Quiet billionaire’s Victorian art collection loaned to Leighton House

Many of the works in Juan Antonio Pérez Simón’s collection were last seen in the UK in the 1890s at the Royal Academy