Puertollano
Puertollano, located in Spain’s Ciudad Real province (Castile-La Mancha), is a historically significant mining city, now transforming into a clean energy hub. With a population of roughly 45,000–50,000, it features a strong industrial sector , notably petrochemicals , alongside a rich cultural heritage. The city is easily accessible via the AVE high-speed train, which connects Madrid and Seville, passing through Puertollano.