It is believed by many that our early technologies can be  attributed to the ingenuity of alien life forms. Are some of the technologies of the past really alien based technology? Many believe that the Pyramids were built by aliens life forms.

Was earth visited in the past by Ancient Aliens flying UFOs around and telling there where to build their cities?
Perhaps hoping that one day in the future we would put together the clues. In an uncanny fashion, these sites seem to be a planned alignment of a multitude of ancient archeological sites around Earth strongly points towards humans of the past being guided, globally, and over many millennia by some sort of higher intelligence.

Nearly all of these sites are considered what is known as a UNESCO World Heritage Site, sites that are of extreme special cultural or physical significance.