On Stone Cochno, dating back to five millenniums, are engraved about ninety mysterious symbols. Although 130 years passed since he discovers, archaeologists did not succeed till nowadays to solve the meaning of this rock carvings. One of a fascinating archaeological mystery from the entire history is considered to be so-called Cochno Stone. Discovered in 1887 by the Reverend James Harvey, in Scotland, the stone measures 13 meters by 7.9 and features enigmatic drawings spirals and bizarre geometrical forms. The incredible markings from Cochno Stone are reminiscent of enormous crop circles who interestingly have been found in many parts of the world. According to experts, the symbols date back to the Neolithic and early Bronze Age, but there are some examples that have been found to date from the Iron Age. Even today it remains a complete mystery as to what message the stone contains, many theories have been put forward to suggest what their purpose may have been. Some archaeologists theorize that the labels are a prehistoric sculpture found in many rock art, in various part of the world. According to others hypotheses, the markings from Cochno Stone could mean an ancient form of writing or could also be markings with religious or spiritual significance. On the other hand, some researchers said that the markings correspond to star constellations or that they are records of land ownership of reflecting boundaries.