The site at Bogland, known as Killynee Chapel and Graveyard, was not simply abandoned or left to decay in the usual manner of ruined medieval churches; it was removed entirely during the construction of the railway line, leaving nothing above ground to mark that it had ever existed.

By the time the Ordnance Survey produced its six-inch map in 1838, the place was already described only as a "site", suggesting the chapel itself had long since fallen out of use. The map shows a rectangular structure set within a small rectangular enclosure, the whole plot measuring roughly thirty metres on its longer axis and twenty metres on the shorter, oriented broadly north-west to south-east. The surrounding ground was marshy, part of a bogland area that has since been drained. What the name Killynee preserves is harder to recover; the "kil" or "kill" prefix in Irish place-names typically derives from the Irish "cill", meaning a church or monastic cell, suggesting this was a site of early Christian significance, though the precise history of the foundation is not recorded. The railway construction that followed the 1838 survey erased whatever physical fabric remained, leaving the cartographic record as the only real evidence that a chapel and burial ground once occupied this patch of reclaimed bog in Wicklow.