On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

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

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

The world's longest known cave system.

Nature and art meet in this curvy creation

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

Former self-sufficient mental institution now a planned community.

The structure has welcomed visitors to this scenic harbor city on Lake Michigan for many decades.

A preserved stump is all that remains of the once-mighty hardwood.

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

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

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

On the shores of Lake Kalamazoo, a plaque marks a fictional event where an island nation ran aground.

In this quiet park a rendition of a classic painting graces the outside of a charming restroom.

This is the last hand-cranked chain ferry of its kind in operation in the United States.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

This tribute to a local man towers within a quaint lakeside park.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.