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.
Chong Nonsi is a BTS station on Silom line that is located on Naradhiwas Rajanagarindra Road, in Bang Rak District.
Here is the map for the area around Chong Nonsi 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 Chong Nonsi Station
Let’s look at the map.
Chong Nonsi is an area in the between of two Bangkok business roads: Sathon Road and Silom Road. You will see that this station connects with BRT, a bus rapid transit system, at Sathon station.
The station itself is a picturesque station. I have always seen this station as a background in Thai TV programs. Many Thai photographers come to this station in order to take photos. You can see some photos here.
Around the station, there is nothing much to see, but there are some nice restaurants and night clubs.
From this station, you can walk to Lalai Sap Market, a popular market among office workers which is located on Silom Road.
Hope this information helps. Enjoy traveling Bangkok!