The Eisenhower Expressway runs underneath the Old Main Post Office, causing one viewer to wonder which came first. Geoffrey Baer delves into the history of these interlinked landmarks and answers other viewer questions in this week’s edition of Ask Geoffrey.

The Chicago History Museum has turned to Kickstarter to fund a project that would train high school students in East Garfield Park how to record oral history interviews with local residents. Learn more about the Forty Blocks project.

Over the course of five decades, Vivian Maier documented city life by taking more than 100,000 photographs, many of them in Chicago. The now-famous street photographer would have celebrated her 90th birthday on Monday. We revisit our story that introduced “Chicago Tonight” viewers to her incredible images.

Geoffrey Baer investigates the history of Asylum Place, the explosive story behind a 1930s death caused by a manhole cover and what happened to magical Chicago restaurant chain. 

Art and science intersect at an historic – and controversial – look at race. A preview of the new exhibition "Looking at Ourselves: Rethinking the Sculptures of Malvina Hoffman."

Geoffrey Baer visits an artist under glass, gets that sinking feeling at a Jackson Park garden, and reveals the hej hej history of the Andersonville neighborhood's name in this encore edition of Ask Geoffrey.

A digital exhibit from the Chicago History Museum explores a found diary from 1894.

Not that long ago, air pollution from burning coal made the Windy City more like the Smoggy City. Geoffrey Baer tells us how Chicago cleaned up its act.

The Skokie museum designed by Chicago architect Stanley Tigerman is now offering architectural tours. Here's what you can expect.

In this encore edition of Ask Geoffrey, our local history expert Geoffrey Baer revisits a Streeterville puppet show, examines underground architecture on the Blue Line and digs deep into the history of Montrose Beach.

Photographer Richard Nickel lived–and died–to save Chicago's architectural treasures. A new book takes us inside the mind of this legendary rebel by sharing his letters, drawings, notes and breathtaking images. Joining us to discuss the book and the man at the center of it are the authors, Richard Cahan and Michael Williams.

There was once a club scene in Chicago that was something of a rarefied world. A photographer who was not part of the scene ventured into one of the clubs and captured a fantastic nightlife that is now long gone and preserved almost exclusively in his work. A new book pairs those photos with poems from an acclaimed poet. Eddie Arruza has the rap.

A small, windowless building on Block 37 is dwarfed by glassy new high-rises. A viewer wonders how it managed to escape the wrecking ball. Geoffrey Baer shares the story behind this unusual building, plus the history of the Marshall Field’s holiday windows and Kermit the Frog’s commercials for milk in this week’s edition of Ask Geoffrey.

A little-known waterway built in the 1830s allowed Chicago to grow not once, but twice! Hear the story of the crucial canal that you may never have heard of, and the story behind one of the South Side's best known public works of art in tonight's edition of Ask Geoffrey.

Geoffrey Baer shares his stroll through Chicago's South Side in a show that premieres tonight.

A famous photo taken in 1940s Bronzeville features the faces of five young African-American men, but their identities have remained a mystery for generations. Local history expert Geoffrey Baer is here with the story behind one of Bronzeville's most enduring images in this week’s edition of Ask Geoffrey.