In Sonaide Bri beliefs, Tír Tairngiri is the palace of Ordae Ruíri, the Golden King who presides over the gods of the Áes Camáir.
The Sonaide Bri believe that Tír Tairngiri is accessed through the mouth of a cave that is perpetually shrouded in a misty fog called The Féth. Tír Tairngiri straddles a gateway between the mortal world and the Feywild. It is traditionally depicted as being made of white marble with gold leaf accents.