The Ontario Heritage Trust works with communities across the province to open the doors, gates and courtyards of their unique and most fascinating cultural sites so you can explore the stories hiding inside.

Every April to October, Ontario’s heritage treasures are open to the public with free events across the province. Whether you are exploring on your own, organizing an outing with family and friends, or planning a first date, Doors Open Ontario has something for everyone.

From historical houses to modern marvels of construction, Doors Open Ontario showcases the buildings, natural spaces, infrastructure and cultural centres that shape and define our communities.

This year, Doors Open Ontario will focus on our rich legacy of medical science and innovation. The number of innovations in medical science, procedures and technology conceived in Ontario is extensive and their stories fascinating. Featured sites include hospitals, medical schools and laboratories that showcase Ontario’s and Canada’s achievements in medicine. Learn more about ingenious innovators and remarkable discoveries while you uncover the places that made medical history.

The Doors Open Ontario website makes it easy for you to discover events happening across the province and identify which of the interesting buildings and sites you would like to visit. Please explore the website and the many features that will help you organize a successful Doors Open Ontario outing. Set up a profile by registering here to save favourite buildings and natural spaces to visit as you plan your adventure.

Since the program was launched in 2002, over six million visits have been made to thousands of unique buildings and spaces, creating new stories with each visit. The Doors Open Ontario program also has a big impact on local communities, as participants spend more than $5 million annually during their travels, as they learn about heritage conservation and local history, and have fun.

Join the millions of visitors who have had a great Doors Open Ontario experience, and start planning your excursion today.

What story will you discover in 2016?

What happened in 2015 …

  • 44 events hosted in 161 communities, representing 76 municipalities and 1,025 buildings/sites
  • Number of participants: 492,943
  • Number of volunteer hours needed to run all local events: 53,870 (value of $969,660)
  • Total revenue for event communities: $5,112,090.36 (from participant spending)
  • 93 per cent of the provincial population live in a community that has hosted a Doors Open Ontario event
  • Of the 30 per cent of participants who came from outside the host community, 71 per cent travelled specifically to participate in Doors Open Ontario