Kanwar Lake - Jaimangla garh, Begusarai

Jaimangala Gardh – An ancient temple of goddess Mangla (Parvati), renowned & trusted for fulfilling devotee’s wishes is sited in village Manjhaul, Begusarai district of Bihar, this temple was developed during Pala dynasty period at the southern flank of Kanwar Lake….

Overall, this place is a complete attraction package for tourists and believers…Presence of generous friendly monkeys add a unique highlight to this place.

Next biggest attraction on its own is Kanwar Lake; a famous bird sanctuary & claimed to be Asia's largest freshwater oxbow lake, where Siberian and other varieties of birds come all the way from Central Asia in winter and use this lake as their shelter…

Some interesting/encouraging facts include:

“The Kanwar Taal or Kabar Taal Lake at Begusarai, Bihar, is Asia's largest freshwater oxbow lake. It is approximately three times the size of the Bharatpur Sanctuary.”
Jai Mangla Temple, Begusarai: Dedicated to goddess Mangla (Parvati), Jai Mangla Temple in Begusarai is a popular religious attraction and is much famous among the locals. Devotees throng the temple in large numbers during the time of festivals such as Navratri and Deepavali.

Few e-sources :

https://en.wikipedia.org/wiki/Kanwar_Lake_Bird_Sanctuary
http://www.easydestination.net/Kanwar_Lake_Bird_Sanctuary.html
https://en.wikipedia.org/wiki/Manjhaul#Jaimangla_Garh
http://wikimapia.org/9644298/Jaimangla-Garh-Temple