One of my favorite areas in Bangkok for walking is between Bang Rak and Talad Noi. A good starting point is at BTS Saphan Taksin Skytrain station, and then just wander north. These photos were tweeted live during a couple of walks in this area. They are not in any particular order. Click on a map link if you like somewhere. It should open in a map app like Google Maps. Then just save this location.