The Guadalquivir (/ˌɡwɑːdəlkɪˈvɪər/, also UK: /-kwɪˈ-/, US: /-kiːˈ-, ˌɡwɑːdəlˈkwɪvər/, Spanish: [ɡwaðalkiˈβiɾ]) is the fifth-longest river in the Iberian Peninsula and the second-longest river with its entire length in Spain. The Guadalquivir is the only major navigable river in Spain. Currently it is navigable from the Gulf of Cádiz to Seville, but in Roman times it was navigable to Córdoba.