A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

The sprawling attraction boasts a collection of more than 150 historic wagons.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

The remnants of a creative early method of wildfire prevention.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

A towering bronze statue memorializes the founding father of postwar American conservatism.

One of the largest open-pit copper mining operations in the entire country.

Inside this garden, visitors are offered a glimpse into how inhabitants of the region survived centuries ago.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Make a wish at what might be America's only Catholic shrine to a sinner.

The graffiti-covered ruins of an abandoned trading post in the middle of Navajo Nation.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Inside this store, a mysterious statue draws visitors from the world over.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

One man handcrafts "the best sake made outside of Japan" in a tiny desert town on Route 66.

Hidden on a cattle ranch in Arizona, this bookstore has been celebrating Southwest literature for more than 40 years.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.