The Stari Grad Plain (Starogradsko polje) is a six-square-kilometre flat of fertile karst soil east of Stari Grad, fenced into the same rectangular Greek plots laid down in the 4th century BC. UNESCO inscribed it as a World Heritage site in 2008 — not for any single monument, but for the persistence of the ancient agricultural pattern itself.
Walk or cycle in from Stari Grad on the network of dry-stone-walled lanes. The plain is still farmed: olive groves, vines, and lavender, with old stone trims (round shepherd's huts) scattered through the fields. A small visitor centre at Dol explains the history. Best in late afternoon when the light is low and the air smells of resin and crushed thyme.