Aras

The Aras is a river in the Caucasus. It rises in eastern Turkey and flows along the borders between Turkey and Armenia, between Turkey and the Nakhchivan exclave of Azerbaijan, between Iran and both Azerbaijan and Armenia, and, finally, through Azerbaijan where it is a tributary of the river Kura.

It drains the south side of the Lesser Caucasus Mountains; after its confluence with the Kura, it drains the north side of the Lesser Caucasus Mountains. The river’s total length is 1,072 kilometres (666 mi) and its watershed covers an area of 102,000 square kilometres (39,000 sq mi). The Aras is one of the longest rivers in the Caucasus.