Torre del telégrafo óptico de La Luisiana Monument · La Luisiana, Comarca de Écija, Seville Image of La Luisiana, not of the place itself. Mid-19th-century tower belonging to the Andalusian optical telegraph line that linked Madrid with Cádiz, preserved as evidence of this communication system that preceded the electric telegraph. Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in La Luisiana