There is a well marked entrance with parking.
Elaborate graphics tell about the area and wildlife.
Yet another forest where evergreens meet above.
There are lots of boggy areas and lots of open water: a great place for wildlife.
Around the edge of the preserve there is a boardwalk near a private house
Plentiful ponds near the trails.
Many modern boardwalks have been added.
The occasional hardwood, among the evergreens.
There are multiple benches where you can stop, rest, and admire the wetlands.
A picturesque mix of wetlands, open water, and forest.
Boardwalks have periodic wide spots for better bird watching.
There is a second boardwalk from the main entrance.
There is a lot to see in this rich environment of forest, wetland, and open water, with many boardwalks. Good signs by the host town of Tewksbury.
More Resources:

Town of Tewksbury Chandler Maps
Various maps of Chandler Well Fields from Tewksbury

Town of Tewksbury Trail Maps
A full set of trail maps for all of Tewksbury.

All Trails
Trails maps and more info.