This stone, said to have once been a young woman, is sacred to the Dakota and Lakota nations.

A ghost town in a remote corner of Oregon hosts a touching tribute to Sacagawea’s son.

This abstract sculpture was initially so disliked that it got moved to the outskirts of town a few months after installation.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

A lonely memorial to the Challenger Space Shuttle, honoring the astronauts who died in 1986.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

The oldest remaining authentic Putt-Putt course that Donald Clayton created in Ohio.

These unusual stone structures are actually fish traps crafted by an ancient civilization.

These seaside shelters once enjoyed by royalty remain a part of local history.

This seemingly normal pathway actually forms a giant fingerprint.

A roadway designed for a visiting monarch.

Eight huge lanterns lining a city street can change color on command.

A 2,000-ton rock resting in a state of a delicate balance.

A picturesque example of brute-force engineering conquering nature.

It took years to decode its mysterious messages.

A showcase of engineering might that was also symbolic of westward expansion.

California's first suspension bridge.

Once the largest town in eastern Yuba County now sits abandoned.

The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

The only remaining historic maritime signal station in the United States.

800 apricot trees honor Silicon Valley's agricultural history.

A memorial dedicated to the victims of the Columbine High School shootings.