From Birdwatching in New Hampshire , p. 89.

You might find almost anything in Eel Pond if it’s not frozen: Goldeneye, Ruddy Ducks, Pied-Billed Grebes, Blue-winged Teal, Mute Swans.

Eel Pond is on NH-1A in Rye, directly across from the Rye Beach Club (Sawyer’s Beach) and just south of Jenness Beach.