One of my all time favorite Thai boat noodle places was right down the street from where I used to live in Bangkok on Soi 31 called "Noodern". I hope it's still there with that incredibly satisfying "Guay Tiew".
Thai Boat Noodles | Traditionally sold by boat vendors that floated along Bangkok’s canals and rivers, hence the name, these noodles are often bought rather than made at home, due to the many different elements that go into the dish. But if you have the time, the effort is definitely worth it. | Recipe From The Feast