Narrow gauge railways in Spain

We don't know which railway these photos were taken on. Can you help us classify them?

• F C de Soller (10 images)
• FC de Alcoy al Puerto de Gandia (28 images)
• FC de Alicante a Denia (1 images)
• FC de Carcagente a Denia (2 images)
• FC de La Robla (7 images)
• FC de Langreo (1 images)
• FC de Olot a Gerona (7 images)
• FC de Ponferrada a Villablino (23 images)
• FC de San Feliu de Guixols a Gerona (14 images)
• Ferrocarriles Catalanes (2 images)
• Ferrocarriles de Penarroya y Puertollano (5 images)
• Industrial railways (5 images)