Fittingly, Footsbarn have set up their big top on Calton Hill in the shadow of the Acropolis, and we are transplanted to the Athenian wood and Theseus's court, rather sinister places beautifully realised in a design that draws from many sources. Masks, live music, fireworks and choreography are used in this most vibrant and witty of interpretations and, as a bonus, the Edinburgh weather adds its own sound effects