Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

One of the oldest surviving Swedish-American homes in the United States.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

A piece of crumbling highway infrastructure was repurposed as a high-tech facility for testing racecars.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

Small caves once used as a hiding place for some of those accused during the Salem Witch Trials.

A home built and settled by a refugee of the Salem Witch Trials.

This historic Massachusetts tavern played a critical role in the start of the American Revolution.

The final resting place of New England's last "vampire."

Designed to not only to represent the history of the local community but also, the future.

A single light illuminates one man's overshadowed contributions to street lamp history.

The oldest still-operating tavern in the United States was once owned by a pirate.

Amazingly, this old machine within the Resorts Casino still functions.

The grave of Mary Nasson is shrouded by witchy legends.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Home to the Titanic Historical Society's collection.

This exhibit is devoted to the games and wonder that Hasbro has brought children worldwide.

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

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A men’s restroom became a sandwich shop.