Caer Llan - Credit: Wikimedia Commons
Caer Llan is a field studies centre, conference centre and former country house located at Lydart within the community of Mitchel Troy, Monmouthshire, south east Wales, about south-west of Monmouth.Ordnance Survey: Explorer map sheet OL14 Wye Valley & Forest of Dean It is close to the top of a scarp slope with extensive views westwards over the valley of the River Trothy, and is accessed from the B4293 road. Read more on Wikipedia
Source: en.wikipedia.org