Want to adventure downtown by boat?
From Nichada you can take a taxi to Nonthaburi Pier. It’s the orange flag boat and it costs 15 baht*. It stops running back up the river in early evening, so be sure to check the current schedule on the Chao Praya Express Boat site.
Once you hop on the Express Boat, it will take you toward downtown Bangkok with lots of great places to stop along the way.
*subject to change