A century-old network of freight tunnels underneath the city's historic business district.

This carved armchair marks the final resting place for two pals in the Chicago suburbs.

The inconspicuous grave of the University of Illinois' first president is just steps from the main quadrangle.

The Reagan Peace Garden at Eureka College features a chunk of the Berlin Wall.

After an Illinois church was struck by lightning and burned down, Frank Lloyd Wright designed this replacement.

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

This colorful monument commemorates a little-known story from the life of Abraham Lincoln.

The first home and studio that belonged to the famous architect.

The final resting place of two unknown soldiers.

A small museum celebrating the fiberglass giants that are icons of America's highways.

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

The final resting place of the hero of Air Florida Flight 90 known as "the man in the water."

Fragments of a massive unfinished sculpture sit near the main quad of the University of Illinois.

Steel remnants of a bridge make up a unique sculpture along the banks of the Illinois River.

A giant wooden statue of one of the greatest pitchers in 19th-century baseball.

This graveyard is home to the so-called "Witch's Circle."

In the middle of Calvary Cemetery stands this singular memorial to a small boy who died too young.

This small-town opera house has appeared much more in national culture and history than its charming setting might suggest.

A student designed this 3D-printed scale replica of the entire university campus.

A Depression-era sculpture by Charles Umlauf survives in a small suburban post office.

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

From banquet hall to Masonic Lodge and now concert venue, Ganz Hall is a breathtaking glimpse of into the golden age of American architecture.

Meant for a railway that was never built because of the Great Chicago Fire, these piers still stand nearly 150 years after they were installed.

Kwanu'sila the Thunderbird has been silently watching over Chicago for more than 100 years (kind of).