There was something about lots of sheep being killed in the building process, I can't remember exactly why, but I have the vague impression they used the lanolin (oil from the wool) as grease to slide the stones over logs. I could be completely wrong though. There is also a kind of blue stone that was placed inside the circle that is only found in the mountains in Wales which I think is about 300 miles away. In the 80s during the Margaret Thatcher era in England a group of people called the New Age Travellers held rituals at Stonehenge at the summer solstice I think, when there is a significant lining up of the sun with the stones, where they danced around naked, and the government sent riot police to break it up, since they were "defiling this sacred space" even though it was probably originally designed to be used for rituals. Also stonehenge wasn't built all at once. different parts were added on over time (millenia), I don't know why it stopped being kept up and added to, but it would be kind of cool if people still worked on it today. That's all I can think if about Stonehenge for right now. The practice of setting up megalithic (large stone) structures seems to have been practiced quite frequently, a notable example being Menec, Carnac, France where teenagers set up row upon row of standing stones. If you ever read the popular comic Asterix, the "Menhirs" that Obelix is always carrying around are like those stones. A legend about the Carnac standing stones is that (I think) a Roman army was attacking, but the Gallic warriors who were there would not retreat even though they faced certain death, and the latter were turned to stone magically so they would not face defeat.