In the realm of exploration, there are those who dare to venture where few have trodden before. Such is the case with Joe Thompson, an amateur explorer hailing from County Dublin, Ireland. His recent odyssey has thrust him into the spotlight as the first person in centuries to delve into the depths of an ancient souterrain, located just 20 kilometers (12.4 miles) north-northeast of Dublin. Join us as we embark on a journey through time and underground chambers, where history and mystery converge.
The Enigmatic Souterrains
Unveiling the Hidden World
The story begins when Joe Thompson’s friend, Denis, stumbled upon an intriguing secret hidden beneath a cauliflower field. It all started innocently enough, with the use of a harrow in agricultural preparation. Little did Denis know that his ploughing would lead to the revelation of an ancient tunnel system, hidden for centuries beneath the soil.
Medieval Souterrain
Situated in Donabate, County Dublin, this medieval souterrain quickly captured the imagination of Joe and his adventurous comrades. Joe documented their exploration in a captivating video, sharing the eerie and mesmerizing experience of delving into the unknown. Eamonn Willeth, another local resident, also embarked on this subterranean adventure, adding to the intrigue surrounding the site.
Reporting the Discovery

News of this remarkable find reached the ears of the Fingal County Council and the National Monuments Service, prompting an official visit to assess the site’s historical significance. However, the true nature of the souterrain remains shrouded in mystery, with differing theories emerging.
Souterrains: A Historical Enigma
A Storage Solution or a Refuge?
Archaeologists in Ireland have proposed two primary interpretations for these subterranean structures. The first posits that souterrains were primarily utilized as food storage facilities, designed to maintain moderate temperatures underground. This function was especially crucial during the early 9th-century AD Viking raids in Ireland, when they served as secret hiding places from marauding invaders.
A Matter of Origins
Delving into the linguistic and historical roots, the term ‘souterrain’ finds its origins in the Proto-Celtic word ‘uaimh,’ meaning cave. These structures are scattered across Ireland, with over 1,000 known souterrains and 18 more in County Dublin. Most were constructed during the 9th to 12th centuries AD.
Ogham Script: A Cryptic Discovery
Adding another layer of intrigue, Joe Thompson believes he has identified ancient Ogham script within the chamber. This script, used between the 4th and 6th centuries AD, raises questions about the chamber’s origins and purpose.
Diverse Interpretations of Ireland’s Subterranean Wonders

Challenging Historical Timelines
Some scholars contend that souterrains were built and used between approximately 500-1200 AD. However, researcher Mark Clinton, in his 2001 book “The Souterrains of Ireland,” challenges these dates, proposing a later construction period from around 750 AD to 1200 AD.
Monastic Origins
Perhaps the most intriguing perspective comes from Clinton’s work, suggesting that these subterranean stone chambers were initiated by monks returning from Europe. He theorizes that some souterrains began as early Christian sacred sites for reclusive monastic contemplation and prayer.
Ancient Links
Clinton’s research uncovers an even more profound connection between souterrains and Ireland’s past. He asserts that the County Meath souterrains are integral components of a complex network of passage tomb complexes dating back to 3,000 to 3,500 BC.
The Ogham Script Enigma
A Historian’s Perspective
Local historian Peadar Bates, upon inspecting the site, introduces a captivating twist. He acknowledges the traditional food storage hypothesis but underscores the complexity introduced by the Ogham script. If indeed Ogham, the script suggests a much older origin, possibly predating 1100 AD. This revelation challenges the narrative, raising the possibility that this souterrain may have initially been a sacred space before later repurposing.
In the heart of Ireland, beneath its lush fields and unassuming landscapes, lies a world of secrets waiting to be unearthed. Joe Thompson’s discovery has cast a spotlight on the enigmatic souterrains, leaving us with more questions than answers. As we ponder their true purpose and historical significance, one thing remains certain: the past is never truly buried.
Featured Image Source: Joe Thompson / Dublin Gazette