Phra That Maha Chai is located at Wat Khosadaram, Tambon Maha Chai, some 40 kilometers from Nakhon Phanom town on the Nakhon Phanom-Sakon Nakhon (Highway No. 22). The monastery is easily accessible via a 2-kilometer road that leads directly to the temple. The chedi enshrines the holy relics of Lord Buddha. Inside the convocation hall is Thailand’s largest wooden Buddha image. The hall also features exquisite murals depicting the life of Lord Buddha that are regarded as one of the finest and rarest murals of the Northeast.