An abandoned 19th-century hospital now swirling in ghost stories.

A nearly abandoned 19th-century town on the Palouse.

Protected from the elements, these Native American rock paintings have survived approximately 250 years.

This family-owned restaurant celebrates Native American cuisine.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

This strategically-placed fountain creates the magnificent illusion of mustangs galloping across a river.

This small, unassuming street is now a canvas for color and creativity.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A self-built castle made by a mysterious man.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This lovely pocket park is one of the most under appreciated in D.C.

The oldest continuously operating fish market in the United States.

An Industrial Revolution-era public work that purified water using nothing but sand.

People escaping slavery may have hidden inside a corpse vault.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A derelict bit of transportation infrastructure hidden in the woods.

A wondrous old library overlooking the nation's capital.

A historic neighborhood church is reborn as a psychedelic arts collective.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The United States Capitol's former columns still stand.