Located in the Bhagalpur district of Bihar, Vikramshila Gangetic Dolphin Sanctuary is a 50 km stretch of Ganges River from Sultanganj to Kahalgaon. The dolphin population across India is estimated to be a little over 1,500. Half of these are found in the Ganga in Bihar. It is the only protected area for these endangered dolphins in Asia. (by-7wondersofindia)
