Well, you’d maybe build a stone circle to keep yourself and your livestock secure, and a cursus perhaps to get said livestock safely down to the river and back again. Very practical, very necessary and a blindingly obvious thing to have to do. X thousand years on and we come along and call these places sacred, temples to the sun or moon, hospitals, places for the dead, Neolithic computers, a windmill...

Nah... call me a killjoy, but romanticising these places reminds me of the housewife who always cut the leg bone off her joint of ham before bunging it into the pot; her mother did it that way and so did her grandmother but she didn’t know why. The answer’s at the bottom of the page but you’ll have to turn your monitor upside-down to read it ;-)