This is a restaurant called "Rathkeaw" located at the Tewa Boutique Hotel which is the cutest little place! It's an old Thai home converted into a hotel and restaurant, with a lovely lush surrounding. They specialize in old, traditional eastern Thai cuisine. Food was delicious with a very simple, home-cooking feel about it which I adored. A bit out of the way of downtown, and they're often closed for weddings and events, so please call ahead if you plan to go!
Rathkaew Authentic Thai Restaurant (@Tewa Boutique Hotel)
131/3 M.4 Soi Chaengwattana 13