Thanks for your interest to Visit
Bangladesh. I am not sure Whether you ask for how to go travel inside
Bangladesh or
Bangladesh.
You can go
Bangladesh by air or road from
Nepal. If you choose road, you have to cross through
India. From
Katmandu you have to come Kakorvita border, cross Indian border and then take a bus again to Burimari border. After crossing that border you will get many nozzles to
Dhaka. From
Dhaka you can get buses to many Southern area.
If you have any specific questions, please let me know.