Eynak lagoon (glasses lagoon) is located in the margin of Daneshjou Park in the west of Rasht town and in terms of area, it is considered as the second largest pond of Gilan province. This pond is called Eynak (glasses) as it is seen as one in aerial photos.
This pond is one of the important touristic areas of Rasht. Its area is 12 kilometers and its water resource is 30 hectares. In Eynak swamp, there are approximately 2 tons of farmed Salmon and Carp fish.