Seville's El Arenal neighborhood rests on the eastern shore of the Guadalquivir River (west of El Centro) and is recognizable by the prominent 13th-century Torre del Oro sticking out in the skyline.

The Guadalquivir River once served as the main waterway in southern Spain, and Seville was Spain’s primary ... others were fascinated by the maps on display that depict how the first explorers ...