Wat Phrathat Doi Khao Kwai Kaew is a hilltop temple in Chiang Rai that is associated with the story of Sih Hoo Hah Tah (fig.), a local legendary creature with four ears and five eyes, that eats red-hot charcoal which it defecates as pure gold.

According to the legend, the creature was thought to be the incarnation of the father of a boy called Ai Thuk Khata (อ้ายทุกคตะ), who had caught the animal and later married Simah (สีมา) the royal daughter of Phaya Phanthumatiraat (พันธุมะติราช).

When the latter died, his ashes were enshrined in this temple, that was reportedly specially built for this event, and as his son-in-law, Ai Thuk Khata became the king's successor.

On the western flank of the hill is a platform with a balcony that can be reached by a flower-tunnel and that gives access to a small cave that contains charcoaled wood that is used to feed this local mythological creature, and which is offered to the animal in small braziers called tao tahn, i.e. ‘charcoal stoves’ (fig.).