Given that Cordoba has more World Heritage sites than both Paris and Rome, you should probably visit something historical.
The Historic Centre of Cordoba is a living expression of the different cultures that have existed there and reflects thousands of years of occupation by different groups (Roman, Visigoth, Islam, Judaism and Christian) through its architecture and the mixture of traditions that remain part of the city. Within the centre is the Mezquita de Cordoba (The Great Mosque/Cathedral). Built to be a mosque and then converted to be a cathedral, this is a uniquely artistic, historically important and culturally significant building. Even more so, due to its size and the sheer boldness of the height of its ceilings. It contains an irreplaceable testimony of the Caliphate of Cordoba and has the second largest surface area of any mosque, after the Holy Mosque in Mecca. The areas of importance stretch further to the banks of the River GuadaIquivir, which include the Roman bridge and the Calahorra tower. The banks of the river and the surrounding areas, which were the site of the extensive trading economy of the city, is also a historical ensemble of extraordinary value. Close by is The Alcázar, also known as The Fortress, which is more of a palace. Home to various rulers, this incredible piece of history is as beautiful as it is significant with its Moorish bathhouse, water features and lush gardens.