This tiny old water tower once doubled as a makeshift jail.

This three-dimensional brick mural is the longest of its kind in the United States.

An obelisk commemorating Lincoln's role in connecting the coasts.

This historic early-20th-century building still boasts some of its original features.

A unique blue and yellow phone booth in America's "Little Sweden."

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The second oldest continuously operating bar in Louisiana.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

The childhood home of the famous general's mother is now a small, walled garden.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

A diverse, expansive nature preserve in northeastern Kansas.

Cannon designed to fire an atomic warhead.

This 41,000-acre wetland complex is the largest marsh in the interior of the United States.

These otherworldly limestone formations jut out from the Kansas prairie.

This 100-foot tall bluff located in the western plains of Kansas overlooks a massive reservoir.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

This mid-19th-century dugout was once home to a Swedish family as they erected their homestead.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This historic railroad hotel built from Kansas limestone was once the most popular hotels for traveling salesmen in the midwest.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

This airport also offers travelers the chance to view thousands of years of Turkish history.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.