During winter thousands of migratory birds flock the big beautiful pond creating a spectacular scene.

Situated at Gorgram, 16 kilometres off Nilphamari Zila Sadar, Nilsagar has become a very popular tourist spot for hundreds from home and abroad.

Two hundred years ago the pond was called Birat Dighi after the name of King Birat. Afterwards it was named as Biran Dighi, because of its clear water where the horizon meets. Many also called the pond as Biraj Dighi or Billah Dighi.

However, ultimately it was renamed as Nilsagar after the name of Nilphamari, famous for indigo cultivation. Indigo cultivating Nagas revolted here against the British rulers. Devi Chowdhurani attacked the foreign masters from two sides simultaneously and defeated them. General people joined the revolution which spread all around.

Nilphamari Sub-divisional headquarters was established in 1875 at Bagdogra under Domar thana. The sub-divisional headquarters was shifted to its present site at Nilphamari in 1882. After 110 years Nilphamari became a full-fledged district.

Then an initiative was taken to turn Nilsagar area into a national park by creating a safe abode for migratory birds. A massive aforestation programme was undertaken while the Nilphamari Zila Parishad undertook the maintenance work of its banks and internal roads were constructed. The zila parishad also constructed car parking lots, guard sheds, general toilets, rest houses and some other buildings.

The existing facilities are grossly inadequate for visitors who come to relax and pass their time close to nature. Every day hundreds of people come to the site with their friends or dear ones. They want establishment of a full-fledged tourist spot here.

However, the Parjatan Corporation is yet to take up any programme to turn it into a tourist spot.

There is an old Hindu temple near here. Every year members of the Hindu community assemble here to have a holy dip during 'Baishakhi Purnima'.

Extensive archaeological excavation may be conducted here. The Fisheries Department conducted a drive here in1957 and found the existence of a pucca structure including a pucca wall in Nilsagar.

At present the scenic beauty of Nilsagar has been decreasing. It needs proper attention by the authorities concerned.