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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

An avant garde art museum at the University of Chicago.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.

A hollow cement depiction of time's inexorable effect on the human body.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

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

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

These abandoned grain silos and tunnels are an urban exploration dream.

A lush green oasis in the middle of Chicago.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

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

The 606 is a decade in the making.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

Beloved bar home to musicians of all eras and reputations.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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

This historic hotel invented the chocolate brownie.

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

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