Over the long centuries of history, humanity has accumulated thousands of unsolved mysteries. We have collected the most mysterious and intriguing ones. What weapons did the ancients possess? What was the civilization of the Cyclops? Why did the Amazons disappear? Will the secret of the Nazca Desert be revealed? What did the Vikings do in Paraguay? Who built the Great Wall of China and why? Why didn't the Germans bomb Lipetsk? And also - all kinds of conspiracies, coups, executions and revolutions... The reader has never seen such a collection of secrets under one cover. All of them found refuge in different chapters, nestling in different eras and on all continents.