Machu Picchu was eventually abandoned by its inhabitants and consumed by the jungle. It is the ultimate fate of all cities to vanish. Or fade into the surrounding landscape. Nature patiently awaits the moment when it can take control again. But sometimes cities disappear simply because we change our ideas about them. This picture, taken from a tourist guide to a city in Poland, originates from the communist era and we can still see in it a hopeful future of socialistic ideals. Yet, in hindsight, we cannot help but see these apartment buildings, however sunny they appear, as a symbol of a failed notion.