Kammer, there is already an entry on TMA - see

http://www.themodernantiquarian.com/search/?action=search&site_names=Y&search_string=gop

I have my pics and write up on TMP:
Caves: http://www.megalithic.co.uk/article.php?sid=5974
Cairn: http://www.megalithic.co.uk/article.php?sid=5975

Coflein also points out a possible barrow in the wood through which one walks; this is likely a natural feature.

Plenty to see in the area; one could easily spend a good few hours visiting the sites there.

Cheers

Tim