The hemp of Callosa de Segura Historical milestone · Callosa de Segura, El Baix Segura, Alicante Image of Callosa de Segura, not of the place itself. From the eighteenth century the hemp grown in the market gardens sustained Callosa: espadrilles, ropes and nets came out of its workshops. Synthetic fibre sank the sector in the sixties, but the town reinvented itself as a great producer of ropes and nets. siglos XVIII-XX Photo: Tilmarion (CC BY 3.0) What to see and do in Callosa de Segura