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.
- http://www.mass.gov/dcr/parks/northeast/wldn.htm

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.
- http://www.walden.org/

Thoreau's Walden Pond
- Information and pictures on the Concord MA State Park.
- http://www.nanosft.com/walden/