Trespassing becomes a non-issue this weekend as over 150 buildings across the city welcome in the general public for Doors Open Toronto. This year’s theme is Secrets and Spirits: Exploring the Mysteries Behind the Door, as an overwhelming number of locations boast hidden rooms and passages, as well as stories of a mysterious and ghostly nature. Check out the list of participating museums, historical sites, and corporations, peruse our guide to nine sites that will be part of the event for the first time this year—and start planning your route!

What else is happening:

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