A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This unique zoo is the only place in the world where you can see all 15 species of crane.

A large circus museum with summer performances.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

Wisconsin's most celebrated export gets the royal treatment on I-94.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

Huge abstract sculptures of the Puerto Rican Flag.

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

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

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

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

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

To find the "unicorns of the deep" you've got to go downstairs.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

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

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

This historic hotel invented the chocolate brownie.

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

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.