Chilika Lagoon lies in the districts of Puri ,Khurda and Ganjam of Odisha State along the eastern coast of India. It is well connected to the Chennai and Kolkata through National Highway No 5, and the Chennai Kolkata rail line passes along the western bank of the Lagoon Balugaon, with Balugaon, Chilika and Rambha being the main stations along the Western shoreline of the lagoon. Chilika lies about 50 km southwest of the city of Puri from where it is connected by road up to Satpara on the eastern bank. It is the largest brackish Water Lagoon with estuarine character that sprawls along the east coast. It is the largest wintering ground for migratory waterfowl found anywhere on the Indian sub-continent. It is one of the hotspot of biodiversity in the country, and some rare, vulnerable and endangered species listed in the IUCN Red List of threatened Animals inhabit in the lagoon for atleast part of their life cycle. The waterspread area of Chilika varies between 1165 to 906 sq.km during the monsoon and summer respectively. A 32 km long, narrow, outer channel connects the main lagoon to the Bay of Bengal, near the village Motto. The mouth connecting the channel to the sea is close to the north eastern end of the lagoon. High tides near this inlet mouth drive in salt water through the channel during the dry months, from December to June. With the onset of the rains, the 52 river and rivulets falling into the Chilika are in spate, causing fresh water currents which gradually push the sea water out. Due to littoral drift prevailing along the east coast the inlet mouth constantly changes position. The lagoon itself can be broadly divided into four natural sectors based on salinity and depth: the southern zone, central zone, northern zone and the outer channel. A number of islands are present in the lagoon with habitation and without the habitation, prominent among which are Krushnaprasad, Nalaban, Kalijai, Somolo, Honeymoon, Breakfast and Birds Island. Chilika supports some of the largest congregation of migratory birds in the country, particularly during the winter. Flocks of migratory waterfowl arrive from as far as the Caspian Sea, Lake Baikal, Aral Sea, remote parts of Russia, Kirghiz steppes of Mongolia, Central and South East Asia, Ladakh and the Himalayas, to feed and breed in its fertile waters. 52 number of rivers and rivulets drain into Chilika Lagoon. It is place to get re-energize.A vacation for week is needed to explore the natural beauty.Its best in winter