A group of workers has been ascending Slieve Gullion, the tallest mountain in County Armagh, with the specific aim of restoring an ancient passage tomb located at its summit.
The activity is taking place on Wednesday, which marks the autumn equinox and represents the midpoint between the summer solstice and winter solstice.
At this time of year, daylight hours are nearly balanced against darkness due to the tilt of the earth's axis directing sunlight toward the equator.
In such northern latitudes, the direction of sunrise shifts significantly with the seasons, appearing in the south-east during winter months and north-east during summer.
The current project involves physical labour focused on maintaining the integrity of the prehistoric structure.
Reports indicate that the team is engaged in tasks described as fulfilling for those involved in the preservation work.
Slieve Gullion is distinct from other sites associated with solstice celebrations, as this event occurs specifically on the equinox date.
The restoration efforts are being conducted at a location where the ground level rises to form the highest point within the county.