There are different signs at different entrances to Woodchuck Hill.
This little boardwalk is needed when the rains come; this was taken after a very dry summer.
There are lots of trail markers; different colors on different trails.
Someone takes good care of the trails and cuts trees that fall across them.
The main path is really an old road, with stone walls on both sides.
Good example of well marked side trail.
Another dry stream that is probably pretty active in springtime.
Looks like a foundation of a building.
There is a strange very rectangular pond on some maps, but...
It's just overgrown now. Perhaps it was a small reservoir?
Some places the trails exit to neighborhoods with large modern houses.
Clearly the trails border state forest.
The many stone walls indicate that this was once farm land, like so much of New England.
These two neighboring parks offer hundreds of acres of wetland and woods trails.
Check the excellent website of the Friends of North Andover Trails for events at these places, and more information.
More Resources:

James Swamp at FONAT!
The webpage of the Friends of North Andover Trails

Woodchuck Hill at FONAT!
The webpage of the Friends of North Andover Trails

All Trails for Woodchuck Hill
Recommended trails and map