The ornamental pond on the grounds of Blessington Demesne in County Wicklow defies easy categorisation, which may explain the administrative uncertainty. It is a circular pond, roughly forty metres across and three and a half metres deep, with a three-metre walkway running around its lip, a deliberate and carefully proportioned piece of designed landscape rather than anything that occurred by accident or nature.

Ornamental water features of this kind were a standard element of demesne landscaping in eighteenth and nineteenth century Ireland, where the grounds of a country house were shaped to suggest an idealised version of nature, controlled and composed. The circular form here is particularly formal, more geometric than the serpentine lakes that became fashionable under the influence of English landscape gardening. The walkway around the rim reinforces this: it was made to be walked, the water to be looked at from close range, the whole thing conceived as an experience rather than simply a reservoir or a drainage solution. That it sits on level terrain within the demesne adds to the sense of something placed rather than found.