Once the largest gravity dam in the world.

This Tudor-style mansion is home to the first roadside confectioner in the United States.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

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

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

100 massive sculptures in the Hudson River Valley.

A historic bridge with a lovely acoustic anomaly.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

This historic Victorian mansion is allegedly so haunted that a signed waiver is required to enter.

This 25-foot-tall gorilla made his way from the Wildwood boardwalk to a Pine Barrens gas station and deli.

Take a step into the workshop where Edison and his employees revolutionized the world.

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

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A walk through the historic city center, under the streets of Seattle.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A formerly abandoned mental institute, now back in business.

Utopia and nostalgia mingle at the site of Bronson Alcott's ill-fated agrarian commune.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

Final resting place of a New Haven urban legend.

The grave of Mary Nasson is shrouded by witchy legends.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.