Dumfoyn is a hill in the Campsie Fells of Scotland. It is a volcanic plug, and rises to 426 metres. It sits beside another hill, Dumgoyne which is a popular ascent for walkers due to its close proximity to Glasgow. ... Found on http://en.wikipedia.org/wiki/Dumfoyn
1) Volcanic plug of Scotland 
Dumfoyn is a hill in the Campsie Fells of Scotland. It is a volcanic plug, and rises to 426 metres. It sits beside another hill, Dumgoyne which is a popular ascent for walkers due to its close proximity to Glasgow. ...