Great Harbour International Buffet ICONSIAM เกรท ฮาร์เบอร์ อินเตอร์เนชั่นแนล บุฟเฟ่ต์ ไอคอนสยาม

Great Harbour is a Taiwanese international buffet chain, and its ICONSIAM outlet takes up room 629 on the sixth floor, with seating for about 400 according to Airportels. Ryoii counts more than 80 dishes across six stations covering seafood, Japanese, Chinese and desserts. Airportels lists roast duck, wagyu sushi, eel rice, sashimi, oysters and a cheese selection, and Wongnai users name cheese-baked prawns, wagyu noodle soup and Peking duck as the plates to go back for.

It runs two sittings a day. Eatigo's March 2026 listing gives 12:00 to 14:30 and 17:00 to 21:00; Ryoii starts dinner at 17:30 and Klook lists other times again, so call before you go. Ryoii gives the walk-in price as 1,099++ baht. Booking platforms cap the meal at two hours. Booking ahead usually costs less than walking in: Hungry Hub has sold packages from 899 baht, Eatigo advertised up to 50% off the bill in March 2026, and Waug sells a one-person voucher that covers tax and free-flow soft drinks but not alcohol.

Scores differ by platform. Eatigo's page quotes a Google rating of 4.4 from 1,761 reviews, Wongnai shows 4.0 and Hungry Hub 4.7. Reserve on 02 055 1888, especially for a big group. Eatigo's directions are BTS to Saphan Taksin and the ICONSIAM shuttle boat across the river; the BTS Gold Line to Charoen Nakhon also works.