MRT (Metropolitan Rapid Transit) is Bangkok rapid transit system, which is known as subway. Currently MRT provides service only one line (Blue line) which has 18 stations between Hua Lamphong and Bang Sue.
Bang Sue MRT station is a station that is located near Bang Sue Railway Station.
What to see around Bang Sue MRT Station
Currently Bang Sue is a MRT terminal station. It is located near Bang Sue Railway Station and Siam Cement PCL.
For me, there is nothing much to see around the station. This area is a local residential area and there are local markets and street food stalls around. But no big shopping mall or tourist attractive places.
Hope this information helps. Enjoy traveling Bangkok!