Roughly subcircular in form, measuring approximately 60 metres north to south and 50 metres east to west, it is defined by a bank, the kind of earthwork boundary that could mark a settlement, a farmstead, or a place set apart for any number of purposes. Attached to its southern side is a large enclosed field of comparable dimensions, suggesting that whatever activity took place here, it required both a defined inner space and associated land.

The enclosure sits within what is described as a multiperiod field system, meaning the landscape around it preserves evidence of human activity across several distinct eras, each generation of farmers or settlers leaving their own layer of boundary, wall, and enclosure on top of or alongside what came before. The Burren, of which this ridge forms a part, is well known for exactly this kind of accumulated landscape, where prehistoric, early medieval, and post-medieval remains can coexist within a few hundred metres of one another. The enclosure at Faunarooska occupies the northern end of its shelf, a position that would have offered elevation and prospect across the surrounding terrain. Its identification relies on aerial and satellite imagery, including Ordnance Survey ortho photography captured between 2013 and 2018, which means it belongs to a category of sites known largely from above rather than from any excavation or ground investigation.