Located on Pho Chai Road in the Mueang Nong Khai Municipality, Wat Pho Chai is where Luangpho Phra Sai, a sacred Buddha image of the town which is respected by the people of Nong Khai, is situated. This Buddha image sits cross-legged, which was cast from bright yellow gold in the posture of subduing Mara, has graceful features. According to legend, three daughters of the King of Lan Chang had three Buddha images cast and named each to associate with their names: Phra Soem, Phra Suk, and Phra Sai to the eldest, middle, and youngest siblings, respectively.
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