Megaliths are prehistoric structures that were built from giant stone blocks, and they are among the greatest mysteries of mankind. How these monuments were built and what purpose they served has not yet been definitively explained. Only one thing is certain: that the number of these stone puzzles in Europe alone has been put at over 40,000, and that similar structures can also be found in Asia, Africa and America. This impressive documentary looks at possible construction techniques from the time and explores the social and religious environment of this historic epoch.
