The lynching and burial site of America's first train robbers.

The site of a gold-digging conquistador's bloody landing in the Americas.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

The highest point in Maryland is only accessible by hiking through another state.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

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

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

Colorado's only true geyser is hidden within the San Juan National Forest.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

No matter what the plaque under this massive legume says, this is not the world's largest peanut.

The final resting place of the camel who served with the Confederate Army during the Civil War.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

A whimsical monument deep in this park commemorates the groups that helped build it.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

A Kansas grassroots sculptor decorates the local roadways with his sculptures made from found objects.

One of the coolest murals in Minneapolis.