The Arbia River is a small waterway located in the region of Tuscany, Italy. It flows through the picturesque landscape of the Val d'Arbia, which is known for its rolling hills and charming medieval towns. The river is a tributary of the Ombrone River and plays a role in the local ecosystem. The Arbia River is approximately 30 kilometers long and is primarily fed by rainfall and local springs. It is an important resource for agriculture in the area, providing irrigation for nearby fields. The river also supports various wildlife, contributing to the biodiversity of the Tuscany region.