But have you ever wondered which freshwater bodies are the deepest in Massachusetts? Here's a few of the ones that SCUBA gear ...

During his daily wanderings through field and forest, he also noted when migrating birds returned, when leaves burst forth on trees, and when the ice melted on Walden Pond. Some 160 years later ...

Thoreau had built himself a 10- by 15-foot cabin with secondhand lumber on shoreline property at Walden owned by Emerson. Thoreau lived at the pond for two years, two months and two days.