Chelmsford does this great thing between Thanksgiving and NewYear's annually now (this was the 4th annual). In the town's open spaces a random tree is decorated and the hunt is on to find them. This year there were 16 trees scattered throughout the town. Locations:
Sunny Meadow Farm
Red Wind Farm
Crooked Spring Reservation
Deep Brook Reservation
Moore's Nature Park
Russel Mill Forest (+ a bonus tree)
George BB Wright Land
Lime Quarry Reservation
Andrew found all 16! Oliver found 8 trees (not bad for a part-timer).
Here is a picture at Andrew's 16th tree in Thanksgiving Forest on Christmas afternoon.
Get out there!