Mercado Central de Abastos Monument · La Línea de la Concepción, Campo de Gibraltar, Cádiz A public market designed in 1878 by the architect Adolfo del Castillo and completed in 1882, with a wrought-iron roof over its central nave. 1878-1882 Photo: Rockysantos (CC0) What to see and do in La Línea de la Concepción