Ask any local where the best boat noodles in Bangkok are they'll point you in the direction of Doy Kuay Teow Reua. Don't get it confused with the mediocre cluster of boat noodle joints that line up along the canal (dubbed Boat Noodle Alley) next to the Victory Monument's large roundabout.
Boat noodles are named after the cooks who plied their bowls of noodle soup from small boats along Bangkok's network of canals. A dark fragrant broth simmered with garlic, pickled bean curd, spices, dark soy sauce thickened with a little pig or cow blood are typically served in tiny bowls over rice noodles. It's perfectly normal to order four or five bowls in one sitting. When diners leave, there's small towers of bowls on empty tables that have yet to be cleared away.
Doy Kuay Teow Reua is housed in a quiet spot along the canal in a large yet simple open-sided structure with a corrugated iron roof keeping Bangkok's sun or rain off the rows of metal tables covered in plastic table clothes. There's little more here than a few ceiling fans, the odd old-school TV mounted on the pillars, a few framed photos of the royal family and a long metal serving station making up the humble restaurant.
Service is quick and the staff are friendly. Unless you come during peak hours, you'll almost always be seated without waiting. Bowls start at 15 THB (around US $0.50). They're official opening hours are 8am to 5.30pm, but they are often sold out by the mid afternoon.