An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A speakeasy takes on Chicago's drinking culture.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

The unusual burial monument of Arizona's first governor.

A geological mystery on Camelback Mountain.

An out of this world experience.

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.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

One of the largest trees of its kind in California.

The classic Atari game's iconic aliens have invaded downtown San Diego.

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

Rumor had it that these concrete crosses scattered across the Arizona scrubland helped align spy satellites. (They didn’t.)

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This collection of vintage signs reflects the long and colorful history of this Arizona town.

A natural history wunderkammer in the middle of the desert.

This mosaic-covered bar is brimming with curated curios.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

A kitschy, creepy St. Louis mainstay.

This is not your typical jungle gym.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.