What makes it quietly odd is not the walls themselves but what sits inside them: a grass-covered rectangular rock outcrop rising from the centre of the space, almost like a table, its geometry just regular enough to make you wonder whether nature or human hands shaped it.

The enclosure measures roughly 23 metres by 28 metres internally, its boundary formed by drystone walling on three sides, with a noticeably thicker double-faced wall along the south-east. Drystone construction is exactly what it sounds like, stone laid without mortar, relying on careful fitting and gravity to hold its form, and in the Burren this technique has been used across many centuries and many different purposes. Whether the existing walls here were built on top of an earlier structure is genuinely uncertain; there is some collapse and spread around the base, but not enough to settle the question. A small subrectangular annexe extends from the south corner, adding another layer of uncertainty about how the space was used and in what sequence it was built up. The enclosure appears on Tim Robinson's celebrated 1977 map of the Burren, a document that has done as much as any archaeological survey to bring the region's dense and layered landscape to wider attention.