Chiang Khong has a few “must see / must do” tourist items…
Mekong River Boat Trips

Tung Na Noi Hmong Village

Phu Chi Fah mountain

A spectacular cliff top mountain viewpoint south of Chiang Khong right on the Laos border, with absolutely stunning spectacular panoramic views. Recommended as a day trip from Chiang Khong. See this GT Rider Trip Report