Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

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

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

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

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

Limestone caves with spectacular showcase chambers.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

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

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

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This geothermal hot spring hides beneath a slowly growing mineral dome.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A Wild West jailhouse that slid down the mountainside.