Ancient Vedic Saraswati River.....

The Sarasvati River (Sanskrit: सरस्वती नदी sárasvatī nadī) is one of the main Rigvedic rivers mentioned in ancient Sanskrit texts. The Nadistuti hymn in the Rigveda (10.75) mentions the Sarasvati between the Yamuna in the east and the Sutlej in the west, and later Vedic texts like Tandya and Jaiminiya Brahmanas as well as the Mahabharata mention that the Sarasvati dried up in a desert. The goddess Sarasvati
was originally a personification of this river, but later developed an independent identity and
gained a different meaning. [source: Wikipedia]

Pra ksodasa dhayasa sasra
esa Sarasvati dharunamayasi puh
prababadhana rathyeva yati
visa apo mahina sindhuranyah

"Pure in her course from the mountains to the ocean, alone of streams Sarasvati hath listened."Rig Veda 07.095.01.1-2

The source of the Saraswati river (ref:  http://ancienthistory.about.com/od/indusvalleyciv/g/053009Saraswati.htm)
is the Har-ki-Dun (valley of gods) glacier in Garhwal (Uttarakhand)
 

Saraswati river bed from sattelite

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