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

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A Bibliophile's Dream.

Moving, mind-blowing metal sculpture work of an outsider artist.

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.

Chicago’s incendiary role in the labor movement.

The final resting place of President Chester A. Arthur and hundreds of others from Revolutionary War soldiers to poets, politicians, and painters.

One of the finest examples of a black soil prairie that was barely saved by the Great Depression.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

The final resting place of the world's first nuclear reactor.

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

Statue dedicated to the star of an old television show.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A unique botanical garden housed in three giant geodesic domes.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A six-story-tall golden pyramid, surrounded by a moat.

These abandoned grain silos and tunnels are an urban exploration dream.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

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

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

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

The murals have transformed a residential alley into a vibrant drive-through gallery.