Chicago’s last original drive-in restaurant is a family-run hot dog joint that started in 1948.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

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

A hot dog stand where the heads are just as hot as the dogs.

Years of archaeology, just chillin' by the water cooler.

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

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

The oldest institution of higher education in Wisconsin and the first to admit women.

These pretty kitties killed and ate as many as 135 railway workers.

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

The last remnants of a lakeside airport that was bulldozed overnight by the mayor of Chicago.

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

A unique 3-D sculpture based on Rene Magritte’s “The Red Model.”

The palatial McDonald's that inspired Wesley Willis.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

The last remaining vestige of a popular 1999 public art display.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A tiny 1857 chapel sits on top of a secluded, forested hill.

Picturesque and haunting, these 160-year-old stone ruins on top of a bluff are the only remains of a settler's legacy.

This synagogue in Madison, Wisconsin, is a historic architectural gem and one of the oldest surviving synagogue buildings in the United States.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

The life of one of America's pre-eminent painters is frozen in time in the home where he lived, worked, and died.

A magnificent church designed by world-renowned architect, Frank Lloyd Wright.