This year's winning Serpentine Pavilion, designed by BIG, came with an architectural posse—for the first time in the Serpentine Pavilion's history, the annual competition also featured four "Summer Houses" designed by other international architects. The pavilion and summer houses open to the public tomorrow on the Serpentine Galleries' lawn in London's Royal Kensington Gardens, and we discuss our initial take on their at once surprising and familiar elements. Get briefed on the pavilion and the summer houses with Robert Urquhart's coverage here.