Most people’s visit to Nepal consists either a trip down to Chitwan National Park or a hiking trip near Pokhara. Chitwan National Park is famous for country’s animals namely tigers and rhinos, and it is scarily cheap to visit.
In short, if you feel like trying to spot a tiger in wildlife, then this is the most accessible national park to go to. My itinerary was Delhi-Agra-Keoladeo National Park in Bharatpur (for birds)- Ranthambhore National Park in Sawai Madhopur-Jaipur...