Mt. Abu is a granite intrusion in the otherwise sedimentary rock formations
of the Aravail Mountains which together with the Appalachians of North America
constitute the oldest mountain system of the world. Gurushikhar rising to 5,600
feet is the highest peak between the Himalayas and the Nilgiris.
The Ashram of Lord Vashishtha is situated on this hill, which is renowned in
all the three worlds and by spending one night in the Ashram one gets the
“Punya” of donating a thousand cows. Mt. Abu, the Abode of the Gods, a place
of pilgrimage for the Hindus and the Jains alike has been a place of military
vantage and its 2,000 year old Achalgarh Fort has remained invincible.