Theopetra Cave contains the oldest man-made structure in the world. It is a rock wall that scientists believe was used by the early inhabitants of the cave to protect themselves from freezing cold, strong winds and other manifestations of the cruelty of nature. The traces of the first life in the cave go back to the earliest times, where it is possible to trace human traces of groups who lived at the end of the Ice Age and the beginning of the agricultural stage. There is a specialized museum near the cave that reviews the development of human life through the antiquities found in the area.