on Ban Tanao, Praeng Nara, Praeng Poothon and Bam Rung Muang streets. It passes the eastern boundary of old Rattanakosin towndefined by outer city moat and the remain of city wall and Mahakan fort.
Route 3 starts from Maha Chessada Bodin Plaza (No.1) on Ratchadamnoen Klang boulevard, then turn left to Ban tanao road and visit Praeng Poothon area, turn left again and walk along Bam Rung Muang road and lastly to Maha Chai road. The total length of the route is about 2.8 kilometres and it will take less than an hour walk.During walking along Bam Rung Muang road, be careful of traffic accident because there is no footpath on the road. Moreover, nuisance pollution from heavy traffic on this road is frequently unavoidable. Taking Saturday or Sunday for tracing this route maybe more convenient and safer than weekdays.