One of the world’s largest living advertisements is made out of pine trees.

A bizarre house filled with an astounding array of collections.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

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

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

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

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

The Hudson River School comes alive at this palatial estate.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

"A hideous albatross in the Hudson River Valley."

100 massive sculptures in the Hudson River Valley.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Elevated freight railway turned wildly successful urban park.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

The homestead of American patriot John Adams.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.