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.
