Yet it is one of the quieter curiosities at Maumnahaltora, where the northernmost of the local wedge tombs goes by the name Altar, or An Althóir in Irish.

Wedge tombs are among the most common megalithic monument types in Ireland, generally dated to the late Neolithic and early Bronze Age, and named for the characteristic way their galleries taper and decrease in height from front to back. The tomb at Maumnahaltora follows this pattern closely. Its gallery, roughly five metres in overall length, is divided into three sections. A short portico at the western end, about a metre long, is separated from the main chamber by a large septal stone, a dividing slab that projects beyond the gallery walls on both sides. The main chamber itself is further subdivided by a pair of transverse stones set into the walls, creating a front section and a narrower eastern section. The sidestones confirm the classic wedge profile: their height decreases steadily from west to east, and the rear of the gallery closes in slightly as it goes. Outer walls flank the gallery on both sides, with the southern outer-wall stones converging sharply towards the eastern end. Parts of the structure are missing or ruined, including the northern side of the portico and the eastern end of the main chamber, but enough survives to read the original form with some confidence. The prostrate stone to the south, measuring about 1.6 metres at its longest dimension, was noted with its apparent cup-marks by researchers as far back as 1939, and again by Sheehy in 1982. A shallow curved depression in the ground just beyond the western entrance adds another small, unresolved detail to the site.

The tomb was documented in detail by J. Cuppage as part of the Dingle Peninsula archaeological survey published in 1986, and also appears in Ruaidhrí de Valera and Seán Ó Nualláin's Survey of the Megalithic Tombs of Ireland, Volume IV, published in 1982. The Dingle Peninsula, on the Corca Dhuibhne peninsula in west Kerry, has an unusually dense concentration of prehistoric monuments, and the name An Althóir, meaning the altar, points to how local communities have long interpreted these ancient structures through the lens of more familiar ritual life.