The smallest post office in the United States is no bigger than a broom closet.

Wander the sprawling living museum on the site of one of a 16th-century community.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

One of the most scenic falls in Massachusetts has a history of death and grim legend.

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

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.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Resonating tubes make music from highway overpass.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

Herman Melville wrote 'Moby Dick' in this landmark 18th-century house surrounded by farmland.

The mansion home of author Edith Wharton.

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.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

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

The massive machine creates cracking displays of indoor lightning.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Narrowest house in Boston.

This landmark cemetery in Boston was created more than 300 years ago.

The Boston square dedicated to the dark poet who was born nearby.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.