This year's Serpentine pavilion could be mistaken for a visiting spaceship

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credit: Bonnie Alter

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Every year for the past 14, London's Serpentine Gallery has commissioned an architect to design a temporary summer Pavilion. This year it is the turn of Chilean architect Smiljan Radic and it is a stunner.

The architect calls it a fragile shell in the shape of a hoop. Others have said it looks like a giant bubble, or an egg, or a cocoon, a flying bagel or a rough-cast blob. It floats in Kensington Gardens, perched on huge stones.