Locally it is called Poll Dominic, and tradition holds that it was the hiding place for a highwayman's gold. The passage is now only a rectangular depression in the ground, roughly six and a half metres long and just over a metre wide, with small fragments of its original drystone lining still clinging to the sides. The monument it belongs to is a rath, or ringfort, an enclosed farmstead of the early medieval period, typically defined by a raised circular or oval platform surrounded by a ditch and earthen bank. This one is irregular, disturbed, and partly obscured by vegetation, which may partly explain why the legend has outlasted any clear memory of what the place originally was.

The site sits on a south-facing slope, and its topography is genuinely unusual. The enclosing ditch, called a fosse, does not run consistently around the platform. In the north-east quadrant it is absent altogether, possibly because a now-disused field bank once ran along that side. Elsewhere the fosse varies dramatically in scale, from less than half a metre deep at the north to a full seven and a half metres wide where it meets the stream to the west. In the south-west quadrant, the natural stream gully takes over the defensive role entirely, its bed lying five to six metres below the crest of the platform. That platform itself is terraced along much of its southern half, dropping in two stages to the water or ditch below. The outer bank survives only in the south-east quadrant, rising two metres above the fosse. A small D-shaped drystone chamber tucked into the outer edge of the fosse to the north is thought to be a relatively modern animal shelter rather than anything early medieval, a quiet reminder that people have been making use of this sheltered angle of land for a long time, for entirely ordinary reasons. The souterrain itself, of which Poll Dominic is the last visible trace, was a roofed underground passage of the kind commonly built within ringforts, used for storage or refuge. J. Cuppage documented the site in the 1986 Dingle Peninsula archaeological survey, and the local name Poll Dominic was recorded as early as 1939 by the writer known as An Seabhac.