In the Sahara Desert in Egypt, are the oldest known astronomically aligned stones in the world called Nabta. For a thousand years before Stonehenge, people built a stone circle and other structures on the shores of lake, which has long dried up. More than 6,000 years ago, stone slabs three meters high was dragged over a kilometer to create this place. Pictured rocks are only part of the entire complex, which has been preserved. However, the Egyptian Western Desert completely dry, it was not so in the past.