Rai Tiam Tan Noodle

This nondescript eatery in Dusit is probably one of our favorite places to savor beef soup in Bangkok. If you arrive early enough, you might still ask for the option with Kobe waygu, but these perfectly seasoned bowls tend to sell out fast. Otherwise, you can try the Thai beef option, which is also cooked decently, and is best enjoyed with chili vinegar.