La ciudad perdida
- Annu: 1955
- Paese: Italy, Spain
- Genre: Drama, Thriller
- Studio: Pico Films, Nervión Films
- Parolla chjave: spain, kidnapping, communist infiltrator, spanish republican, post spanish civil war
- Direttore: Rafael María Torrecilla, Margarita Alexandre
- Cast: Cosetta Greco, Fausto Tozzi, María Dolores Pradera, Félix Dafauce, Nani Fernández, Manolo Morán