Rannathai is a Thai restaurant in the basement of Lotte Castle Ivy in Yeouido, Seoul. It serves bpoonim pad pong kari, tom yum goong, and fried rice, cooked by a Thai head chef. Many people come for lunch gatherings, so there can be a wait when it is crowded. The spicy dishes are quite hot, and the spice aromas can be uncomfortable for those sensitive to them.