Another form is the menhir, a simple upright stone usually placed with others to form a circle, as at Stonehenge and Avebury in England, or a straight alignment, as at Carnac in France.

另种形式是史前巨石柱，这是与其他直立石组成个圆圈的直立石碑，如英格兰的巨石阵和爱扶倍利，或排成直线，如法国的卡尔纳克。