Aminjikarai (Amainda Karai) is one of the oldest localities in Chennai. It is located on the banks of the Cooum River. The arterial Poonamallee High Road runs through it. Arumbakkam and Anna Nagar were carved out of Aminjikarai in the '50s and '70s. Chennai   (Tamil: ), formerly known as Madras  , is the capital of the state of Tamil Nadu and is Indias fourth largest metropolitan city. ... Cooum River is the famous river which ends in Chennai; ... Anna Nagar is one of the posh residential localities in the metropolitan city of Chennai, Tamil Nadu, India. ...