Dry-stone construction, intangible heritage Historical milestone · Castelldans, Garrigues, Lleida Image of Castelldans, not of the place itself. In 2018 UNESCO recognised dry stone construction as intangible cultural heritage. In les Garrigues that technique left field margins, vaulted huts and cisterns raised without mortar by the peasants to gain ground on the dry farmland. 2018 Photo: jordi domènech (CC BY-SA 3.0) What to see and do in Castelldans