This historic hotel invented the chocolate brownie.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

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

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

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A military museum and library dedicated to the citizen soldier.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

A Japanese temple, old German townhouses, and public chess tables offer a peaceful escape from the bustle of the North Side.

No one knows how many bodies are in this vault in a Chicago public park.

All of Chicago's wood-paved streets are long gone but two alleys remain.

How did a 2,000-year-old Roman column find its way to a Chicago park?

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Home to a protest movement, a bombing, and a dramatic change in labor history.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

Illegal drag racing two stories beneath Chicago’s streets.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

A fashion designer's dazzling world of Japanese collectibles is hidden in a warehouse downtown.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.