White Cube Mason’s Yard plays host to some of the most innovative international exhibitions in the world. Built from an electrical substation round the corner from founder Jay Jopling’s first gallery on Ryder Street, the Mason’s Yard space is the first free-standing structure to be built in the historic St James’s area for more than 30 years. Only ever showing an artist once, the private views that spill out over the cobbled yard are particularly special.