A 12,000-year-old bog boasting rare plants and fauna.

This historic mini-suspension bridge was swept away once but is now here to stay.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Even Henry David Thoreau found this glacial pothole irresistible.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Civil War Fort on an island in the Boston Harbor.

The bears may be gone, but their old cages can still be found.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Hut with supplies for shipwreck survivors.

The site of the first "historically true" UFO encounter in the U.S.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Trash escaped from a landfill to fill beaches with all kinds of treasure.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Over fifty whirling pools left by the glacial age.

America's oldest archaeological site or a muddled case of wishful thinking.