The remains have been designated as a Scheduled Ancient Monument, accessible to the public.
Elizabeth de Burgh, the wife of Robert the Bruce died here, although it has been suggested this was at an earlier castle.
Excavations were conducted in February–October 2017 to restore parts of the network and minimise erosion.
The other one was dug in an area less disturbed by foot traffic and did not locate the path despite being excavated to a depth of 150 millimetres (5.9 in).
Foundation bases for picnic tables and benches and a replacement flagpole socket were installed during the excavations.