Contour Rings 60-490m 
Notes: Contour Ring Hunting.. yes, it's a thing (well at least on Dartefacts anyway!) This activity requires the visiting of ALL Contour Rings located within the Dartmoor National Park. A contour ring can be a small mound, a huge plateau or even a pit or depression on the Ordnance Survey 1:25k map. It must be a contour 'loop' that contains no other contour loops. Sometimes it can be surprising to find that there is no mound present, the height of the terrain just happened to clip a contour line. The funniest are the ones where you're expecting a large mound and you find it is a depression or pit. At the moment I am uncertain how many of these contour rings there are within the National Park.. it will certainly take some time (and eye-strain) inspecting every one of those 1044 km squares! The Dartefacts Map (below) displays 1:25k map features for logged-in Registered Users which will show you every contour ring listed, whereas the standard 1:50k mapping does not.
Where there are several Contour Rings in one area, Dartefacts instead of listing them separately merges them into 'Contour Ring Clusters'. It is important to note that Contour Ring Clusters listed will all contain Contour Rings of the same height, so if there is a mix of 210 m and 220 m high Contour Rings then there will be two separate listings.
Do not assume that a Contour Ring listed is legally accessible.
Notes: This classification also holds interesting contour line features that may or may not be particularly evident on the ground. These could include significant spurs, reentrants, lowest point, remotest points etc. etc. that are not necessarily named on OS maps.
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