Nestled at the foot of Errigal (the hightest mountain in County Donegal) and overlooking the beautiful Poisoned Glen sits the beautiful 'Old Church of Dunlewey'.

The church is built of white marble and blue quartzite which was quarried locally. The supply of marble in the nearby quarry has now been depleted. The red brick in the arches of the windows was produced locally. Remenants of the brickfield are still visible near Oilean Ghrainne when the level of the lake is lowered.