According to
Transit Toronto and James Bow, the Bay Concourse was built into what was once a Canada Post office at Union Station.
The concourse, a network of narrow corridors and stairwells, was designed by
Rounthwaite, Dick and Hadley Architects. It cost $10 million or $43 million in today's dollars to build.
What has always resembled a large, public washroom to me opened in 1979 strictly for use by GO Transit passengers.
There are no "throwbacks" of pictures on the Internet that I could find about its grand opening on August 2nd, 1979, and the only news article I could find was this clipping from the Toronto Star on July 27 of that year:
I paid $9.99 plus tax for this clipping.
I suggest you print it out and frame it.
It was proposed on Twitter that Metrolinx throw a 70s-themed farewell party. I said we should pay $10 to get a chance to swing a sledgehammer with all proceeds donated to charity.
Change is coming. It will be rough. It will be brutal. It will take at least two years.