The port city of Valencia is on Spain’s southeastern Orange Blossom Coast, where the Turia River meets the Mediterranean Sea. It’s known for its City of Arts and Sciences, with futuristic structures including a planetarium, an oceanarium and an interactive museum. Valencia also has several beaches, including some within nearby Albufera park, a wetlands reserve with a lake, walking trails and bird-watching. Valencia was founded as a Roman colony in 138 BCE. Its historic centre is one of the largest in Spain, with approximately 169 hectares; this heritage of ancient monuments, views and cultural attractions makes Valencia one of the country's most popular tourist destinations. Valencia has a relatively dry subtropical Mediterranean climate with very mild winters and long warm to hot summers.