This unassuming dip in the landscape marks the likely location of a souterrain at Umrycam, in the townland of Mintiaghs Ed. First noted by M. R. Colhoun, this underground feature represents one of Ireland's most fascinating yet often overlooked archaeological treasures.

Souterrains, from the French term meaning 'underground', are artificial cave systems that were dug out and constructed across Ireland, particularly during the early medieval period. These subterranean passages, typically lined with stone and covered with capstones, served various purposes; from food storage taking advantage of the cool, stable temperatures below ground, to places of refuge during raids. The example at Umrycam joins hundreds of similar structures scattered across Donegal, each one a testament to the ingenuity and resourcefulness of Ireland's early medieval communities.

While this particular souterrain remains unexcavated and largely hidden from view, its presence was documented as part of the comprehensive Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983. The survey catalogued field antiquities spanning from the Mesolithic Period through to the 17th century, ensuring that even subtle features like this depression in a farmer's field wouldn't be lost to memory. Today, the site continues to lie beneath the worked soil, a quiet reminder that Ireland's archaeological heritage often exists right beneath our feet, waiting patiently in the most ordinary of places.