They are places of history, forgotten, threatened and threatening at the same time. Built of steel, blasted into rock, cast in concrete: former monuments of great historical eras come to life again. These places are also full of personal stories that are told to us by contemporary witnesses. Very personal memories of natural catastrophes, wars or global supergaus, to which the monuments and places, and not infrequently also people, fell victim. In four episodes we visit twelve such “lost places”: military bases, showpiece buildings, tourist paradises and sanatoriums. Through the people who once lived and worked here, we rediscover these mysterious places.