One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

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

A century-old miner's quarters turned mansion.

An assortment of armored tanks and Howitzer cannons in the middle of the Sonoran Desert.

A historic jail preserves etchings from over a century of incarcerated people in a town with a rough and tumble past.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The lobby of this hotel near the U.S.-Mexico border features a stained-glass mural that measures 42 feet long and 6 feet tall.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

This church on a Tohono O'Odham reservation has stood since 1797.

More than a century old, this trading post resides in the Navajo Nation.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

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

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

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

The remnants of a creative early method of wildfire prevention.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

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

This unique competition celebrates an American Indian and Canadian First Nation cultural tradition.

The stone-covered graves lie within the ruins of an Old West ghost town.

This bomb shelter-themed bar has barely changed since it opened.