Geoffrey Baer tells us what's at the end of the line for old "L" cars and more in this week's edition of Ask Geoffrey. Read an article and view a slideshow.

Geoffrey Baer's newest program -- A Taste for the Past: Architect Pier Carlo Bontempi -- is a profile of a little-known Italian architect who is this year's winner of the Driehaus Prize, a prestigious, Chicago-based award for architects who design classical and traditional buildings. It debuts on WTTW11 at 8:00 pm Thursday. Geoffrey joins us to tell us about his adventures in Italy. Watch an anecdote from Bontempi's childhood, read an interview with the documentary's producer and co-writer, and see behind-the-scenes photos from Ialy.

Geoffrey Baer sheds some light on a colorful Chicago firehouse tradition that has a maritime connection, the real life Mr. Selfridge’s time in Chicago and the location of the city’s first revolving doors this week's edition of Ask Geoffrey.

A chunk of transportation history rests in the Chicago River. Geoffrey Baer talks trains and technology in this week's edition of Ask Geoffrey.

Terra-cotta shields and emblems dot the exterior of a historic Chicago factory. Geoffrey Baer reveals the meaning of these marks in this week's edition of Ask Geoffrey.

A little bit of London is hidden on Chicago’s north side – where can you find this charming row of homes? Find out in tonight’s Ask Geoffrey.

Was a Chicago housing project once a stop on the Underground Railroad? Geoffrey Baer discovers a hidden piece of African American history in this week's edition of Ask Geoffrey.

A street near Soldier Field honors a fallen World War II hero. Geoffrey Baer has that soldier's story, and he answers your questions in this week’s edition of Ask Geoffrey.

Misspelled signs are a common sight in Chi-RA-go. Geoffrey Baer shows us a few misspelled signs that have been around town for years in tonight’s Ask Geoffrey.

In this edition of Ask Geoffrey, Geoffrey Baer brings us up to speed on the wildly popular railroad fairs of the late 1940s, where rail enthusiasts flocked to Chicago’s lakefront to see vintage and modern locomotives in action.

What’s wrong with this picture of an old firehouse on Lake Street near Kedzie? Look closely at how the word “Department” is spelled. Geoffrey Baer is on a hunt for more misspelled signs in the Chicago area for an upcoming edition of Ask Geoffrey. If you know of one, please share the information here.

In his newest WTTW special, Geoffrey Baer takes a real time machine to places all over Chicago and looks through it to see things that are now long gone. Geoffrey joins us Tuesday just minutes before the debut of the program to give us a sneak peek. Watch a video preview.

Throughout the 1950s, south suburban families saddled up and rode to the Oak Lawn Round-Up Days. What happened to the festival? Geoffrey Baer rustles up the answer in this week’s edition of Ask Geoffrey.

A new ruling says New York's One World Trade Center will be the nation's tallest building when it is opens next year, swiping the title from Chicago's Willis Tower. Geoffrey Baer has the story.

Just how long have the antique-looking Chicago streetlights been burning? Geoffrey Baer reveals the age of these beauties in this week’s edition of Ask Geoffrey.