BTS is Bangkok elevated rapid transit system, which is known as Skytrain. With BTS, you can go to the major areas in Bangkok without facing traffic jams. Currently BTS has 2 main lines: Sukhumvit line and Silom line.
Bang Na is a BTS station on Sukhumvit line that is located on Sukhumvit Road.
Here is the map for the area around Bang Na BTS Station. I have got this map from BTS official website. The area map for the other BTS stations can be found here. To enlarge, click at the map.
What to see around BTS Bang Na Station
Let’s look at the map.
Bang Na is an outskirts district of Bangkok. Around the station itself, there is nothing much to see. From the station, you can walk to BITEC (Bangkok International Trade & Exhibition Centre), a large convention and exhibition center of Bangkok. Several events are held at BITEC all year long.
There are several temples in this area such as Wat Bang Na Nai, Wat Bang Na Nok, Wat Si Iam. But all of them are not in a walking distance from the station.
Central Bangna and Mega Bangna are the big shopping malls in this area, but they are also not in a walking distance from the station. You have to take a short taxi ride.
If you want to go to Mega Bangna, I recommend you to get off at the previous station, Udom Suk Station. From that station, there is a free shuttle bus take you to Mega Bangna.
Hope this information helps. Enjoy traveling Bangkok!