Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

A warehouse for all of your architectural details.

The only arched bridge made of stone on the entire Mississippi River.

Hub of Scandinavian culture in a Minneapolis deli.

An architecturally-focused antique shop.

20,000 pieces in a Frank Gehry-designed building.

This lab's maddening silence is good for business but bad for sanity.

Collective made up of artists, musicians, and activists.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

The world’s largest Masonic temple was saved by the White Stripes.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

A Beaux-Arts triumph set to become Ford's innovation campus

This historic hotel invented the chocolate brownie.

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

A display of magnificent stained glass windows is the first exhibit of its kind.

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