Cefn Eglwysilan is a 'Marilyn' of just 382m; although the hill top is clearly named as such on their maps the OS apparently know the trig point as Mynydd Eglwysilan.
Uploaded to Geograph by Trevor Littlewood on 5 March 2008
Photo © Trevor Littlewood, 5 March 2008. Licensed for reuse under this Creative Commons licence