Explorers, adventurers, architects and conspiracy theorists dedicate their lives to trying to un-earth the secrets of our increasingly crazy world whichis why it must be so irritating for them when the unexpecting folk of the world stumbling upon incredible things without any plan or determination. Imagine your life’s work being bested by someone who simply happened to be in the right place at the right time? These are the 15 most incredibleartefacts unearthed by accident!