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

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

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

The cinder cone volcano with a less than complimentary name.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The eroded core of an ancient volcano is now accessible by a short hike.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A mysterious spirit totem at the edge of Navajo lands.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

An artificial crater field that trained astronauts for lunar exploration.

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.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

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

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

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

A museum and tribute to a brave profession.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

A colorful, century-old cemetery of the Yaqui Indian Tribe hidden amid the suburban sprawl of Tempe, Arizona.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.