Many Spanish words are derived from Latin because Spain was once part of the Roman Empire. Rome occupied most of Spain from about 209 BC to 586 AD. During that time, massive public structures, including aqueducts and theaters, were built. Some of these, such as the aqueduct that towers over the modern city of Segovia, are still standing. The Latin name for Spain was Hispania.
Can you see the similarity between Hispania and the country's name in Spanish, España?