Gaya (India) and Uttar Gaya are famous places for Hindus. Gaya lies in the Indian state of Bihar. Uttar Gaya, more popularly called Betrawati is in the Nuwakot District of Nepal. Betrawati is about 80 km north of Kathmandu.

Betrawati is the meeting place of three holy rivers, the Betran Ganga, Rudra Ganga, and Trishul Ganga. Betrawati is near to the way to Lang tang Mountain and the Nepal/China border at Kerung.

Lord Shiva created a small river by using a stick of bamboo, which is called Beta. Because of use of the stick of Beta, for its creation, the river has been called Betran Ganga.

Gaya is famous for offering food i.e. rice ball (PINDA) to ancestors by the living sons and daughters along a spiritual performance called Shraddha. Gaya Shradhda is a responsibility of each generation towards their ancestors who are believed to be in the heavenly place, Pitrilok. Each son or daughter performs Gaya Shradhda at least once in his/her lifetime. Nepali Hindus believe that before visiting Gaya in Patna the devotee should have visited and performed Shradhda in Betrawati, the Uttar Gaya.

Source: Wikipedia