Jatashankar is natural cave, a Hindu shrine located north of Pachmarhi, in Hoshangabad district, Madhya Pradesh, India. The Jata Shankar Caves in Pachmarhi are considered sacred as they are popularly believed to be the place where Lord Shiva concealed himself from the wrath of Bhasmasur. The caves boast of a natural Shivalingam under the shadow of a massive rock and the stone formation in the cave closely resemble the mythological hundred headed snake Seshnag. The rock formation in the caves resemble Lord Shiva’s matted hair, hence the name. These caves are a must-visit for devotees.

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http://ashokkoul.blogspot.in/2012/06/panchmarhi-satpuran-hills.html

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