Stonehenge is one of the most famous Stone Age monuments in the world.
It's a UNESCO World Heritage site, which includes the stone circle itself, but also hundreds of other prehistoric monuments scattered around the area...
It's a Prehistoric monument - meaning it was built before the invention of writing.
It's from the Stone Age - the earliest period of Prehistory, which included the Stone Age, the Bronze Age and the Iron Age.
It's Neolithic - meaning the youngest period of the Stone Age, which included the Old Stone Age, Middle Stone Age and New Stone Age - also known as the Paleolithic, Mesolithic and Neolithic.
These different phases of Prehistory saw huge changes in the way humans lived and organised themselves.
During the Paleolithic, humans were nomadic hunters, following large herds of wild animals across the tundra.
Britian had a very harsh climate, so was rarely inhabited.