Hutton Moor is a Neolithic henge and is located south of the three henges in Thornborough. Nothing can be seen of the henge on ground level. However, in aerial photographs, the circular cropmarks of the henge are visible together with the outer embankment and inner ditch.
The henge can clearly be seen on Google Earth under the "Historical Imagery" function and looking at the aerial photography from 2002.
Links: www.megalithic.co.uk, brigantesnation.com, megalithix.wordpress.com