Some local Bus Routes rather than using the Bang Wa BTS if you are feeling adventurous.  Note most bus routes will travel in a full circle back to where you start.  Just some routes are more scenic than others.

 

From Siam University

                                  To                                                           Bus Number

Tesco Lotus 7, 80, 84, 91, 101, 146, 147,  157, 171, 509
The Mall Bankae 7, 80, 84, 91, 101, 146, 147,  157, 171, 509
Seacon Bangkae – fashion shopping mall 7, 80, 84, 91, 101, 146, 147,  157, 171, 509
IT Grand Bangkae – computer center 7, 80, 84, 91, 101, 146, 147,  157, 171, 509
Phraya Thai 3 Hospital 7, 80, 84, 91, 101, 146, 147,  157, 171, 509
Klong San market 84
The Mall Tha Phra 101, 147
Sanam Luang & Kao San Road 80, 91, 157, 171, 509
BTS station Mo Chit 157, 171, 509
Makro 24hr Grocery Market 80, 91, 157, 171, 509