Doors Open Toronto is returning once again in 2023 for a weekend jam-packed full of tours and access to locations that demonstrate Toronto's rich history and culture. 

Every May, Doors Open Toronto invites you to explore some of the city's most-loved and historic sites free of charge. 

The event provides rare access to certain buildings that are not typically open to the public as well as free access to sites that would normally charge an admission fee. 

This year, you'll have the opportunity to explore over 140 buildings across the city, including the Aga Khan Museum, the Danforth Garage/TTC Barns, Toronto's First Post Office, The Second City, Thomas Fisher Rare Book Library, the ZoomerPlex, and the Port Lands Flood Projection Project. 

City Hall is also participating in the event, and this year, you'll have the chance to soak in Toronto's views from the building's 27th floor observation deck. 

Doors Open Toronto 2023 is set to take place from May 27 through May 28. Toronto History Museums will also offer site tours as part of the event on both days from 10 a.m. to 5 p.m. 

You can find the full list of participating sites here.