Doors Open Ontario is a province-wide heritage tourism program that gives the public free access to explore fascinating heritage properties all across Ontario.

This year will feature buildings, natural spaces, infrastructure and cultural landscapes that shape and define our communities.

In 2024, the theme will be adaptive reuse, showcasing heritage sites that have been repurposed to best serve their communities, while retaining their heritage attributes. Through the continued use and reuse of our historical structures, we realize their contribution to the sustainability and the economic and cultural energy of our urban and rural communities.