The Neolithic people of Great Britain were prolific builders.
A crannog at Loch Tay, near the Scottish Crannog Centre, Scotland.
So the Neolithic people started building homes on artificial islands.
Actual figures could be higher as a lot of crannogs have now been completely submerged.
Many are difficult to distinguish from natural islets, unless properly investigated.
Millenniums of disuse have cloaked them with vegetation and now they look like tiny tree-covered islands.
A crannog at Loch Freuchie in Perthshire, Scotland.
This suggests that they were used for other rituals, such as coming of age ceremonies.
