Thoreau's Walden Pond: Information and pictures on the Concord MA State Park.
Walden Pond State Reservation: 333 acres surrounding Walden Pond, a 103-foot deep "kettle" hole pond is set aside from the 2,280 acres of Walden Woods. Site of Henry David Thoreau's dwelling from July 1845 to September 1847.
Walden Woods Project: Preserves Thoreau’s land and legacy by protecting Walden Woods. Offers information on available education programs, and management of the Thoreau Institute’s research collections.