The lasting remains of the region's once booming cement industry.

An American industrialist hoped this nature preserve could help save the North American bison.

Abandoned blast furnaces are an enduring reminder of Scranton's once booming iron business.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Unrepaired walls from a 1920 anarchist bomb attack.

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

A tribute to those that perished during the American Revolution.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The final resting place of the Hollywood star who came to a tragic end.

Pennsylvanian mass grave and possibly mass murder.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This Harriet Tubman mural went viral for kids interacting with it.

Step inside Lucy, the world's largest "elephant."

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

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

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

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

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.