The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.

This sandstone mansion was the home of two of Oregon's most important pioneers.

Hidden in Portland’s West Hills, a 170-year-old marker literally stakes out the Pacific Northwest.

This café is dedicated to serving coffee roasted by Native American-owned companies.

A small, forgotten prison cemetery marked only by a wrought-iron fence and eerie depressions left in the ground.

This unique structure is the only one of its kind in Virginia.

A weathered, American Foursquare-style house originally built for lumber merchant William Wimsatt.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

The first national memorial to honor all women suffragists stands on land where suffragists were once imprisoned.

The last of nine massive kilns that produced many of the red bricks for buildings in Washington, D.C. and northern Virginia in the early 20th century.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

An overgrown garden stands as a grim marker of an unrealized dream.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

An everyday Jackson Heights bodega conceals a Mexican seafood paradise.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Dedicated to preserving the history of free Black communities in Brooklyn and beyond.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

A memorial marks the library lobby where Langston Hughes' ashes are buried.

This Queens beer hall preserves a German culture and language that is all but lost.