Chao Phraya Express Boat
The orange-flag boat: a cheap ride past the temples on both banks
A fuller guide to this place, built from 2 sources, is written in Traditional Chinese.
Being there
Board at Sathorn pier and ride to Tha Chang, passing Wat Arun and the Grand Palace on the way.
The story
The Chao Phraya was Bangkok's first main street, and tens of thousands still commute on it every day. The orange-flag boats stop at every pier, which makes them a good way to see the old city on both banks.