Loved the article in the Tribune. As a 6th generation Chicago native I have many similar attachments to the secrets and history of chicagos past. One of my favorite secrets to photograph and visit have been factory - school clock towers. These are very prevalent on the northside river and ravenswood areas. You can find many of them along Ravenswood avenue and the Chicago river stemming of off Irving Park Road. My favorite is right behind a park near the boys and girls club on the east and south side of Irving Park Road. If you follow the river - and therefore industry that was built along the rivers - north along Ravenswood avenue and then riding in and out of many side streets you will find more factories along the Chicago River the clock towers ( some turned factories to condos)Will amaze you. Best kept secret and a great treasure hun. Having married a South sider I have found a few that rival this area. Also you can head south and find many more thru past addison etc.