The third-largest city in Spain and the largest port in the western Mediterranean, Valencia was founded as a Roman colony in 138 BC and boasts one of the county's largest historic centers as a result. Prepare yourself for acres of ancient monuments and cultural attractions including the Valencia Cathedral and the Llotia de la Seda, a 14th century silk exchange today recognised as a World Heritage Site. The city has spent a great deal of effort restoring its local landmarks, including the ancient towers (Serrano and Quart towers) and the San Miguel de los Reyes monastery. In fact, whole sections of the old city have been restored. If you're visiting in March, you'll enjoy participating in the annual Las Fallas local festival where you can fill up on delicious paella valenciana and party up a storm amidst cultural, musical and comedic processions.