The enormous standing Buddha towering above Roi Et's squat skyline is Phra Phuttha Ratana Mongkon Mahamuni (Luang Po Yai for short), the main attraction at this temple. Despite being of little artistic significance, it's hard to ignore. Head to toe he stands 59.2m, and from the ground to the tip of the ùt·sà·nít it's 67.8m. You can climb up the stairs behind him.
