The 411: Tours leave from the Outdoor Art Club, 1 West Blithedale Ave., every 15 minutes between 9:30am and 4pm on Sunday, May 22. Tickets are $15 for Historical Society members, $20 for non-members, $10 for teens with a student ID and free for children under 10. More info and tix.
Here are a few Then & Now photo comparisons of some of the buildings on the 39th Annual "Walk Into History":