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

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

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

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

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The largest Walleye statue in the world calls this Minnesota town home.

A winged-helmed, sword-brandishing tribute to German Americans.

This tiny Minnesota city tried to secede from the Union as a last-ditch effort to fix its crumbling water system.

Where you can photograph wild black bears without worrying about becoming dinner.

The world's largest floating loon bobs in the lake to kick off an annual festival.

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

No one's quite sure where this quirky university tradition originated.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

The watery grave of an impractical idea.

This iconic water tower and failed bandstand is open for panoramic views once a year.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

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