The civilization of Ancient Mesopotamia grew up along the banks of two great rivers, the Euphrates and the Tigris. In the midst of a vast desert, the peoples of Mesopotamia relied upon these rivers to provide drinking water, agricultural irrigation, and major transportation routes.
A river gives the inhabitants a reliable source of water for drinking and agriculture. Additional benefits include fishing, fertile soil due to annual flooding, and ease of transportation. The first great civilizations, such as those in Mesopotamia and Ancient Egypt, all grew up in river valleys.
The large stone structures created by the Neolithic Europeans are called the Stonehenge. It was built around 4500 - 4000 years ago. It's a circle of stones also known as the megalithic monument.
