Two small markers remember the Alamo's feline protectors.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Belly up to the bar in Cowtown, don't forget to buy some boots.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

The Grand Canyon of Texas.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

These markers are used to document elevation changes around the famed dam.

These markers are used to determine the ground stability of the Strip.

This sign designates the road that leads to the infamous Area 51.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A geological mystery on Camelback Mountain.

What is the Thing?

This 1950s-era nostalgic roadside New Mexico attraction consists of a quirky curio store and museum embedded into the face of a cave.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.