erefordshire is mainly lowland plains tucked away in the shadows of the Welsh Mountains. Agriculture is important to the county's economy, and products include fruit, vegetables, hops, dairy goods and livestock. There are many medieval castles and fortifications built along the Marches borderland between England and Wales. There is also much to see of historical interest in the city of Hereford on the River Wye, including the cathedral and the 13th-century Mappa Mundi, one of the oldest maps in the world.