Stream Mystery of the Crystal Skulls Online Free – Watch Full Movie from Home at 123Movies. . One of archaeology's most compelling mysteries is that of the 13 crystal skulls. The crystal skulls have been some of the most powerful mystical symbols in human history. Several "perfect" crystal skulls have been found in parts of Mexico and Central and South America. Together, they form a mystery as enigmatic as the Great Pyramids and Stonehenge.