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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

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

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.

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

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

A replica of the flagpole that gave a frontier town its name.

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

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

A spiritual vortex among the red rocks in Sedona.

A Wild West jailhouse that slid down the mountainside.

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

Once a year, at exactly 11:11 a.m., this monument comes to life.

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.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A geological mystery on Camelback Mountain.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.