Wat Pho Chai is Nong Khai's most revered temple and the spiritual heart of the town. The main building houses the Luangpho Phra Sai, a sacred Buddha image with a gold head and a bronze body studded with rubies — one of the most venerated Buddha images in northeastern Thailand. The temple itself is large and well maintained, with gilded buildings, beautiful murals, and a constant stream of Thai worshippers.
During the Songkran Festival in April, the Luangpho Phra Sai image is paraded through the town in a grand procession — the biggest event in Nong Khai's calendar. The temple is easy to reach from the town centre and is free to enter. Go in the early morning when the light is beautiful and the worshippers are most numerous.