The first memorial dedicated solely to the Black troops who fought for the Union.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

To find the "unicorns of the deep" you've got to go downstairs.

A winding, cliffside stretch of road overlooking the Delaware River.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Metal dinosaurs lurk in a sculpture garden on the outskirts of a popular resort town.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

Considered by many to be one of the most dangerous highways in Alaska.

Inside this museum, the history of the Walt Disney Family empire is on full display.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

A Masterpiece with a Tragic History.

One of Hollywood’s favorite government buildings.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

This statue honors the author's groundbreaking family story.

World War II bunker still standing on the New Jersey beach.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.