Zebedee Wetland off Houghton Hill Road in Thetford Hill is conserved by the Upper Valley Land Trust.  The 0.75-mile Linny Levin Trail encircles the wetland and is worth taking.
From Jim Block

As Zebedee Wetland is such a special place to the local community, it was important to Upper Valley Land Trust (UVLT) that public access be part of the management goals. UVLT intends for access to be safe for the children and families who come to explore, and we want to ensure that human visitors reduce their impact in preserving the ecological integrity of the wetland.

UVLT and the Thetford Conservation Commission have partnered to create a walking trail in memory of local naturalist and educator, Linny Levin. Linny touched many lives. Her inspiration touches us here, at Zebedee, through the calls of the frogs, the plumage of the visiting birds, and the determined activitiy of the beaver.