During the post-war period, hundreds of thousands of people came to Barcelona, fleeing from poverty and political persecution. Given the lack of housing on their arrival, many of them spent years living in caves and shacks. They were workers looking to improve their quality of life, forced to live in a shantytown. When flats were finally built, they were constructed in substandard buildings and remote areas, a phenomenon known as “vertical shantytowns”. Modern Barcelona has chosen to forget a part of its history, a history that is now told through the mouths of those who endured it. Images shot by amateur filmmakers contrast with the official testimony, offering a glimpse of what that city of forgotten residents was really like.