In California, colorful roadside signs remind us all that love transcends borders.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

America's most famous piece of self-built architecture.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

This well-traveled chess park offers scenic views of the pacific and a colorful, eclectic clientele.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

Outsider art or homage to aliens?

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

An enormous park-like oasis, full of famous Chicagoans' graves.

A Bibliophile's Dream.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

A speakeasy takes on Chicago's drinking culture.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.