A limekiln is shown at on OS 1st editon mapping connected by footpaths to Castell. The kiln is still extant, described as having been quarried into the rock face but heavily overgrown. Modern aerial photography shows only rough, uneven scrub.

Sources include:
Gwynedd Archaeological Trust HER Ref: 7178
NAW Aerial photography 2006-9
OS 1st edition 25in mapping

Maritime Officer, RCAHMW, July 2013.