In the basin of the valley there is an
ombrotrophic raised bog which, having suffered severe ecological damage by commercial peat extraction in 1994, is now a protected site. Much of Glenullin bog that remains today would have been familiar to the different cultures that have populated the valley, including the pre-Christian Iron Age and the people of the Middle Ages who built forts, raths and ritual cairns on prominent locations on hillsides and drumlins. Over recent centuries, the inhabitants of the single-storey, thatched vernacular dwellings that dotted the valley sides harvested
turf from the bog, revealing the stumps of the oaks that once filled the valley. In 1922 an IRA volunteer was buried in the bog. The burial was done at night with a full colour party which indicates it was a respected volunteer. There are no details of his name or burial location but the story has been passed down through generations of the MacNiocaill family (Phaidi Hamish). The original football pitch in Glenullin was Tinkers Park in Coolcoscreghan townland, on the junction of the Lisnascreghog and Glen roads. This field is now livestock grazing. The original GAC meeting hall is a green metal building with a red roof on the Glenullin Road at the junction with Lisnascreghog Road. The current football pitch beside the council sink estate in Curraghmore was opened in 1973. A new GAC training ground was opened in 2014 in a field beside the Brockagh River, opposite the current pitch. In older times, the
Ancient Order of Hibernians played prominence in life in Glenullin. Their old meeting hall can be found in the area known as The Cutting near Brockagh Houses on the Glen Road. There is an old church in Glenullin which can be found on Temple Road, at the Junction with Hillside Road. Although the building is now ruins, the surrounding area was tidied up to allow people to enter the old church grounds and pray. On the junction of Churchtown Road and Ballyrogan Road, Errigal Old Church can be found. This was founded by St Adamnan in the 7th century. The site now consists of the ruined remains of a medieval church in the centre of a walled graveyard, a rock-souterrain and a ballaun stone. The unusual Gortnamoyagh Inauguration Stone, featuring two carved footprints and a staff mark, was used until the 16th century during local Gaelic Chieftain Inauguration ceremonies. ==Parish==