A strange Cuban prison, an eerie escape route for Los Angeles, a dam in Italy, and an underwater marvel near Dover, England that changed history.
Stories:
1) Presidio Modelo Prison, Isla de la Juventud, Cuba;
2) Shoemaker Canyon Road, Los Angeles, California, USA;
3) Vajont Dam, Bellund, Italy;
4) Phoenix Caisson, Littlestone, UK
