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

A stealthy Apache hideaway that became the haunting site of a mass grave.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

The unusual burial monument of Arizona's first governor.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A Wild West jailhouse that slid down the mountainside.

A mysterious "wedding cake" castle in the middle of the urban desert.

This golf ball–shaped former desert real estate office now houses a UFO museum.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

Miniature art that tells an enormous story.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

This historic national park is covered in the stunning ruins of red rock pueblos.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A reproduction of earth's many biomes.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A Saint Nicholas-themed ghost town in the Mojave desert.

America's only nuclear missile silo open to the public.

A self-built castle made by a mysterious man.

Limestone caves with spectacular showcase chambers.