Serpentine pavilion 2017: a shimmering African canopy spreads out over Kensington Gardens

Inspired by a tree used as a meeting place in his native village of Gando, architect Francis Kéré has brought a piece of Burkina Faso to London - a deceptively simple roof that seems to float above the greenery "I almost hope it will rain," says Hans Ulrich Obrist, artistic director of the Serpentine, standing beneath the soaring timber canopy of the gallery's summer pavilion, which plunges inwards to form a conical funnel where rain will be channelled into a circular waterfall. "It has defini...