The rath at Cooleanig, in County Kerry, was not so fortunate. Sometime in the early 1980s, during land reclamation operations, it was levelled entirely, leaving nothing visible where a substantial earthwork once stood on a small hill overlooking the Gaddagh river.

Before it disappeared, the site had been documented as a bivallate enclosure, meaning it was ringed by two earthen banks rather than the single rampart more commonly seen. A rath of this kind, with its double line of defence, would have been a reasonably significant settlement in its time, the kind of enclosed farmstead that formed the basic unit of early medieval Irish rural life. Writing in 1906, a recorder named Cooke noted a double rampart and deep ditch, and also observed a choked entrance to a souterrain in the interior. A souterrain is an underground stone-lined passage, typically associated with storage or, in times of trouble, refuge, and their presence within ringforts is fairly common across Ireland. The local name attached to the site, Liscallee or Lios Caillí in Irish, places it within a familiar naming tradition; the word lios refers to an enclosed fort, and the suffix likely preserves an older personal or descriptive name now difficult to recover with certainty.

There is nothing left to see at Cooleanig today. The map records its former position, and the Ordnance Survey sheets that once marked it as a bivallate enclosure remain as documentary evidence of what was there. The Gaddagh river still runs to the west of where the hill stood, indifferent to what has since been lost above it.