Dassu is the divisional headquarter, whereas Pattan, Palas and Dassu are the three Tehsils of Kohistan District.
Kohistan is one of the least developed districts in the country and its national significance is the Karakurum Highway.
Kohistan is where the famous Hindukush, Karakuram and Himalayan mountain systems meet and serve as a natural boundary for environmental regions in the chains of Himalayan, Karakurum and Hindukush mountains.
KOHISTAN, a tract of country on the Peshawar border of the North-West Frontier Province of India.
Kohistan means the "country of the hills" and corresponds to the English word highlands; but it is specially applied to a district, which is very little known, to the south and west of Chilas, between the Kagan valley and the river Indus.
Like the mountains of Chilas, those in Kohistan are snow-bound and rocky wastes from their crests downwards to 12,000 ft. Below this the hills are covered with fine forest and grass to 5000 or 6000 ft., and in the valleys, especially near the Indus, are fertile basins under cultivation.