Stonehenge

Stonehenge is a story that stretches over thousands of years. It begins in the Stone Age, continues into the Bronze Age, and probably goes back to the Iron Age.

An excerpt from the article 16 facts about Stonehenge
First pits, into which pine pillars about 75 cm in diameter were inserted, date back to about 8,000 BC. There were four or five of them (one pit may have been a remnant of a tree growing there). Three or four pillars were arranged in an east-west line and were probably used to perform religious rituals. Over time, these pillars decayed and fell apart.