Nanda Devi (Hindi: नन्दा देवी ) is the highest mountain in Uttarakhand, the second highest mountain in India, and the highest located entirely within the country (Kangchenjunga is on the border of India and Nepal); owing to this geography it was considered the highest known mountain in the world, until computations on Dhaulagiri by western surveyors in 1808. It was also the highest mountain in India before Sikkim joined the Republic of India.