London's Serpentine Gallery has unveiled the latest of its annual pavilions, a temporary structure resembling a giant misshapen doughnut.

Created by the Chilean architect Smiljan Radic, the temporary fibreglass structure balances on a series of huge boulders and is open on one side.

Designed to be a multi-purpose social space, the pavilion opens to the public on Thursday and will remain in situ until 19 October.