Discover hidden treasures during Doors Open Cornwall SDG Counties
August 10, 2025
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Discover the region’s hidden treasures on Saturday, August 16th, and Sunday, August 17th, during Doors Open Cornwall SDG Counties.
Over the course of the weekend, more than two dozen historic sites, attractions, and local landmarks will open their doors free of charge, giving members of the public a unique chance to see familiar landmarks in a whole new way.
“Doors Open is a great opportunity to celebrate our rich heritage and culture,” said Cory Hagen, Acting Tourism Coordinator with the United Counties of SDG. “Visitors can get an inside look at some of the most interesting and historic buildings and sites in our region.”
Many of the participating locations are open to the public on both days; however, some sites will only be open for one day or for specific hours. The full list of participating sites and hours can be seen below or online at Doors Open Ontario – Cornwall and SDG Counties.
“There are some great attractions and sites for residents and visitors to enjoy, and best of all, it’s free,” said Shauna Baggs, Tourism Officer with the City of Cornwall. “Cornwall and SDG Counties is one of Ontario’s oldest regions, and we have a great history to share.”
Doors Open Participating Sites
Aultsville Theatre
2 St. Lawrence Drive, Cornwall
Hours: Sunday only, 10am – 4pm
The Bishop’s House of Glengarry
20019 County Road 18, St. Raphael’s
Hours: Saturday & Sunday, 10am – 4pm
Carman House Museum
5895 Carman Rd, Iroquois
Hours: Saturday and Sunday: 10am – 4pm
Christ Church Seaway
2 Bethune Avenue, Long Sault
Hours: Saturday only, 10am – 4pm
Cline House Gallery & Studio
204 Second Street East, Cornwall
Hours: Saturday and Sunday, 10am – 4pm
Cornwall Community Museum
100 Water Street West, Cornwall
Hours: Saturday & Sunday, 9am – 4pm
Cornwall Public Library
45 Second Street East, Cornwall
Hours: Saturday only, 9:30am – 3pm (guided tours, book online for 9:45am tour or 2pm tour)
Dev Centre
1950 Montreal Road
Hours: Saturday and Sunday 10am to 4pm
Glengarry Celtic Music Hall of Fame
19687 William st, Williamstown
Hours: Saturday & Sunday 9:30am – 3:30pm
Glengarry County Archives
28 Kenyon Street East, Alexandria
Hours: Saturday & Sunday, 12pm – 4pm
Glengarry Nor’Westers & Loyalist Museum
19651 County Road 17, Williamstown
Hours: Saturday & Sunday, 10am – 4pm
Glengarry Pioneer Museum
1645 County Road 30, Dunvegan
Hours: Saturday & Sunday, 10am – 4pm
Glengarry Sports Hall of Fame
35 Fair Street
Hours: Saturday & Sunday, 10am – 4pm
The Heritage Centre
14 Victoria Street, Chesterville
Hours: Saturday only, 10am – 4pm
Historic SDG Jail
11 Water Street West, Cornwall
Hours: Saturday & Sunday, 10am – 4pm
Judy Neville British Home Child Museum
13740 County Road 2 Morrisburg
Saturday and Sunday: 11am – 4pm
Lost Villages Museum
16361 Fran Laflamme Drive (Ault Park), Long Sault
Saturday and Sunday: 10am – 5pm
Maison Shalom House
170 McCormick Road, Alexandria
Hours: Saturday only 10am – 4pm
Martintown Grist Mill
18544 County Road 18, Martintown
Hours: Saturday & Sunday10am to 4pm
Nativity Co-Cathedral
300 Montreal Road, Cornwall
Hours: Saturday only, 10am – 4pm, Sunday 12pm – 4pm
Priest’s Mill Arts Centre
16 Mill Square, Alexandria
Hours: Saturday & Sunday, 10am – 4pm
Saunders Hydro Dam Visitor Centre
2500B Second Street West, Cornwall
Hours: Saturday & Sunday, 9:30am – 5pm
Sir John Johnson Manor House
19692 William Street, Williamstown
Hours: Saturday & Sunday, 8:30am – 4pm
Springfield Farm “Gunpowder Golf and Country Club”
18709 County Road 25, Applehill
Hours: Saturday 10am – 4pm, Sunday 10am – 12p
St Columban’s Catholic Church
36 Fourth st West
Hours: Saturday only 9am – 2pm
St Finnan’s Basilia
72 St Paul st, Alexandria
Hours: Saturday 10am – 4pm, Sunday 12pm – 5pm
St. John the Evangelist Anglican Church
20788 South Service Road, Lancaster
Hours: Saturday & Sunday, 12pm – 4pm
St John’s Presbyterian Church
28 Second st est, Cornwall
Hours: Saturday 10am – 4pm, Sunday 12pm – 4pm (Sunday service 10am all are welcome)
St. Raphael’s Ruins
19998 County Road 18, South Glengarry
Hours: Saturday & Sunday 9am – 5pm
SD&G Highlanders – Cornwall Armories
505 Fourth Street East, Cornwall
Hours: Saturday & Sunday, 8am – 4pm
Additional information
Doors Open is a province-wide program aimed at promoting the province’s historical sites and landmarks. 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 inside.
For additional information on Doors Open Cornwall SDG Counties, please click here.
#ExploreCornwallON
Looking for other fun things to do in Cornwall? Check out the Explore section of our website for other fun-filled activities to keep you busy. Better yet, consider extending your stay with a night at one of our great accommodations!
Got a question?
Got questions? Need recommendations? We’re here to help! Call or text us at 613-938-4748 or email us at tourism@cornwall.ca and we’ll be pleased to help you with any questions you may have!
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