A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

The remnants of a creative early method of wildfire prevention.

A somber monument commemorates the site of a Native American reservation marked by suffering.

The final resting place of the living embodiment of the famous Forest Service symbol.

Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

A museum in rural Utah documents the history of the Japanese Americans who were forcibly relocated there.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

An eclectic collection of artifacts from the Wild West is preserved in a remote fictional pioneer town.

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

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.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

It was once the base for a series of domestic terror attacks.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.