A "gateway" into Mexico's northern border, represented by an abstract red tower.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A sandstone canyon wilderness with a history of outlaws, mysterious disappearances, and a UFO encounter.

The first commercial phone line west of St. Louis was installed thanks to a group of Cherokee businessmen.

In Tulsa's Oil Capital historic district, even the bus station is "fauxback" Art Deco.

Site of the 1926 murder trial of Ernest Burkhart who was involved in the "Reign of Terror."

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This 1930s-era Route 66 Tulsa landmark was moved, restored, and filled with neon.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

Every autumn, this grove of living fossils erupts in a blaze of brilliant golden-yellow leaves and stinky fruit.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

This train station inspired the name of a 1970's rock band and provided the backdrop for their album cover.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

A natural spring situated on the grounds of the Hawthorne estate.

An eponymous directional signpost erected by the first president of the United States.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The largest protected conservation area in the Ozarks—a region that stretches into northern Arkansas and southern Missouri.

The summer home of the largest colony of bats in the world.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Claims to be the "World's Highest Hill."

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.