Mangan is the district headquarters of North Sikkim, a little hamlet with flower patches, and the water wheels strung with bells set in exquisite miniature gardens more than compensate for the primitiveness of the region. The Mangan Bazaar (market place) is situated on the North Sikkim highway with around fifty odd shops. The district collectorate where the district collector and other government department function is situated around two kilometers uphill from market at a place called Pentok and is approached by a link road. On the sides of this link road while traveling towards Pentok lies a public ground and Mangan Senior Secondary School. Just opposite to Mangan, separated by river Teesta, is seen a sloppy villages namely Lingdong, Barfok, Hee-Gyathang falling under Dzongu area. From the Pentok area, the picturesque view of mount Siniolchu (a range of mount Khangchendzonga) is also seen.

The region is famous for the Phensong and Phodong Monastery, the latter being considered one of the six main monasteries of Sikkim.