Gangasagar or Sagar Island is an island in the Ganges Delta, lying on the continental shelf of Bay of Bengal about 100 km (54 nautical miles) South of Kolkata. The island is large - with an area of 224.3 km. Gangasagar is a charming tourist destination, which attracts both pilgrims and adventure lovers. Located in the Sunderbans, Gangasagar offers the charms of an un-spoilt beach on an estuary of the river Ganges. Gangasagar offers acres of silver sand and clear blue skies, and the calm sea for visitors who would like to spend their weekend relaxing. Also known as Sagardwip, Gangasagar is still quite unexplored and therefore unexploited. The island of Gangasagar is one of the most famous Hindu pilgrimage centres in India. Every year on Makar Sankranti (mid-January), pilgrims from all over India, gather at Gangasagar for a holy dip at the confluence of the River Ganga and the Bay of Bengal. After the holy dip, pilgrims offer 'Puja' at the Kapil Muni Temple. On the occasion of Makar Sankranti, the GangasagarMela is organized on this island, which is one of the biggest fairs in West Bengal.