Editor's note: This story, written by Senior Editor/Writer Bobby Tanzilo, was first published on OnMilwaukee on May 23, 2019.

In my informal, but ongoing, quest to walk the tunnels that burrow beneath the Milwaukee area, I recently hit a not-so-secret jackpot, thanks to Kali Thiel.

Thiel is the director of communications at Concordia University in Mequon, 12800 N. Lake Shore Dr., where almost four miles of tunnels connect the campus buildings. These are corridors of every stripe. Some look just like “garden level” hallways, others basement corridors and still others are more utilitarian and industrial looking.

Click here to read the full story on OnMilwaukee’s site.

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