Walden Pond: An endangered treasure

The National Trust for Historic Preservation has listed Walden Pond and Walden Woods, where Henry David Thoreau wrote his 1854 classic "Walden," one of "America's 11 Most Endangered Historic Places." Historian Douglas Brinkley reports on how the Concord, Mass., pond and its surrounding, spiritually-nourishing woods – a storied part of our national heritage – is under threat from nearby development. "CBS News Sunday Morning" features stories on the arts, music, nature, entertainment, sports, history, science and Americana, and highlights unique human accomplishments and achievements. Check local listings for "CBS News Sunday Morning" broadcast times. Subscribe to the "CBS News Sunday Morning" YouTube channel:    / cbssundaymorning   Get more of "CBS News Sunday Morning": https://cbsnews.com/sunday-morning/ Follow "CBS News Sunday Morning" on Instagram:   / cbssundaymorning   Like "CBS News Sunday Morning" on Facebook:   / cbssundaymorning   Follow "CBS News Sunday Morning" on Twitter:   / cbssunday   Subscribe to our newsletter: https://cbsnews.com/newsletters/ Download the CBS News app: https://www.cbsnews.com/mobile/ Try Paramount+ free: https://paramountplus.com/?ftag=PPM-0... For video licensing inquiries, contact: licensing@veritone.com