The Naga Hills, reaching a height of around 3,826 metres (12,552 ft), lie prominently on the border of India and Myanmar.

[citation needed] They are part of a complex mountain system, and the parts of the mountain ranges[citation needed] inside the Indian state of Nagaland and the Burmese Naga Self-Administered Zone are called the Naga Hills.

[citation needed] A part of the Naga Hills under the British India control was coalesced into a district in 1866.

Nagahill Ophiolite Site (NHO) near Pungro in Kiphire district of Nagaland has been declared a National Geological Monument of India by the Geological Survey of India (GSI), for their protection, maintenance, promotion, and enhancement of geotourism.

[4][5][6] These are the ophiolitic rocks of mantle and oceanic crust percentage at the Indian continental plate margin.