Doors Open is an amazing free event that allows access to areas that are otherwise not open to the public.  Some places are only open for this event.  other places are open but generally charge admission, but on this day, it is free.

September 23rd is the third time this year that Kingston has hosted a Doors Open event.  I hope other cities will do the same too!

https://www.kingstonmuseums.ca/doors-open-kingston-area

https://www.doorsopenontario.on.ca/