This modest post office sits on the site of H.H. Holmes' famous murder castle.

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

Honoring the star of the “The Bob Newhart Show” which took place in the city of Chicago in the 1970s.

Chicago was once a major hub of film production, but being silent film you don’t hear much about it.

The oldest house in Chicago certainly doesn't look the part and there are some who say it doesn't deserve its title either.

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

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

A monument commemorating the discoverer of radio astronomy.

The third-tallest lighthouse in the United States stands as a reminder of Atlantic City's early days.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.

Memorial built in 1922 in remembrance of WWI casualties.

A historic grist mill and active sluice on the Black River.

Local lore claims this park is named after a young woman who jumped off a cliff.

One of the world's largest model railroads is a mind-boggling achievement.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

"No writer ever gave more to a city and got back less.”

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

This softly rounded mansion was built without corners not to avoid evil spirits, but to make them more comfortable.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

An abandoned observatory in the middle of the Illinois prairie.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.