Kiak Kai Pier ; get the Chao Phraya River Express Boat here.
Randy
May 21, 2015
There is a water taxi that starts at this pier and takes you to the heart of the city. One of the nice things is that there are no traffic jams!
Bee
April 15, 2013
Express boat (public transport) for a budget, nice way to reach historical area of Bangkok (Grand Palace, Wat Po, etc..) very easy to get there by bus or a taxi