Laas Gaal or Laas Geel is a complex of caves and rock shelters in Somaliland. Famous for their rock art, the caves are located not far from Hargeisa, and contain some of the earliest known cave paintings in Africa. Laas Gaal's rock art is estimated to date back to somewhere between 9,000–8,000 and 3,000 BCE. © Eric Lafforgue
Carved Petroglyph Lake Onega 4th-3rd millenium BC Figures of men, deer, elks, birds, boats with people in them, circles and semicircles. Some scholars think that the images record the annual economic cycle of the ancient inhabitants of Karelia (circles and semicircles with projections are interpreted as animal traps). Others regard the drawings as mythological scenes connected with sun worship (circles and semicircles) and the cult of ancestors (boats with men).
Stretching across the Nazca plains lay the famous Nazca Lines of Peru. They are associated with the Inca Civilization. One of the grandest enigmas of all time, no one has been able to sufficiently give proof of who built them or their purpose. The Nazca Lines are said to have origins from ancient alien gods, a possible landing strip for returning aliens, and a celestial calendar created by the ancient Nazca civilization (this would put the creation of the lines between 200 BC and 600 AD). If...