Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

The world's largest anatomically accurate brain sculpture.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

This popular pitstop lives up to its name.

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

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

The ruins of this former mining boomtown once housed over 3,000 people. Now, the population is two.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A prison-like structure guards the remains of a notorious Old West outlaw.

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

An antique horse-drawn hearse provided French luxury for the dead in this Texan town.

The quirky gift from West Berlin for the 1968 World's Fair still stands in Hemisfair Park.

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

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

A 131-year-old wunderkammer of Texas history.

Two small markers remember the Alamo's feline protectors.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.