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| | Travel: For hiking, biking, try Walden Pond |
 | | Today, Thoreau's Walden Pond is a popular swimming hole about an hour west of Boston, in Concord -- the ultimate destination of Paul Revere's fabled midnight ride. |
 | | Lined with thick oak and pine woods, Walden Pond is a 102-foot-deep "kettle hole," about 2 miles in circumference, fringed with hiking and biking trails. |
 | | Kettle holes were formed by melting glaciers during the last days of the Ice Age, about 12,000 years ago. |
| www.sptimes.com /News/090901/news_pf/Travel/For_hiking__biking__t.shtml (763 words) |
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