Guru Shikhar, a peak in the Arbuda Mountains of Rajasthan, is the highest point of the Aravalli Range. It rises to an elevation of 1722m. It is 15 km from Mount Abu and a road from there leads almost to the top of the mountain.It is named Guru - Shikhar or 'the peak of the guru' after Dattatreya, an incarnation of Vishnu, and a cave at the summit contains a temple dedicated to him, plus one dedicated his mother, Anasuya, wife of sage Atri nearby.
Adjacent to the temple is the Mt Abu Observatory operated by the Physical Research Laboratory. This observatory hosts a 1.2m infrared telescope and also several Astronomy experiments.