The Aultsville Train Station is a 19th-century wooden station, originally located in the lost village of Aultsville. It is the home to the Judy Neville British Home Child Museum about children who were sent to Canada as indentured labourers. Volunteers are on hand to answer questions, and artifacts and documents are also on display.

The Carman House Museum – a Georgian-era limestone cottage – was built c. 1815. The family was part of the Loyalist migration after the American Revolutionary War, receiving a land grant for their service to the Crown. It is also one of only two original buildings in Iroquois that were not moved for the 1950s construction of the St. Lawrence Seaway.

Built in the late 1850s, the Cline House is one of Cornwall's finest neo-Palladian Georgian homes. The Cline family remained as owners until 1945. Once the home of the Cornwall Public Library, the house has since been converted into a beautiful art gallery and studio that hosts art exhibits and workshops throughout the year.

This museum’s stone building was constructed in 1840 by the Wood family, United Empire Loyalists and one of Cornwall’s founding families. Three generations of the Wood family lived here until 1952 when Walter Wood, a bachelor, died. Several years later, it became a historical museum for Cornwall and SDG. In 2000, it was relocated to Cornwall’s beautiful Lamoureux Park.

This 6-kilometre (3.7-mile) self-guided walking tour is a voyage into Cornwall’s heritage, depicting events and points of interest from Cornwall’s past. The tour follows nearly 30 plaques erected along Cornwall’s waterfront, downtown and in parts of Le Village in the city’s east end – representing industrial links, the former Cornwall Canal and the founding of New Johnstown.

This former post office was retrofitted in 1997 and reopened as the Cornwall Public Library, a vibrant and popular community hub that offers many traditional and digital services. During Doors Open, two special tours will be offered to explore the basement and other parts of the building that are not normally accessible to the public. Registrations on their website required.

Glengarry County has a wealth of Celtic heritage. The Glengarry Celtic Music Hall of Fame, founded in 2003, honours individuals and groups who have contributed to the maintenance of the Celtic music culture in the county, including musicians and promotors. In addition to the recognition of the inductees, they also collect memorabilia relevant to the area’s music and culture.

This Georgian-style building dates back to 1862. In 1967, it became a museum dedicated to depicting the story of Sir John Johnson and other Loyalists who settled in the area during the American Revolution. Special exhibits celebrate the bicentennial of the Williamstown Fair (the oldest agrarian fair in Canada) and the War of 1812.

Opened in 1962, the Glengarry Pioneer Museum has grown to include eight heritage buildings, including the Star Inn, a stagecoach stop in the 1860s. Its barroom is thought to be one of the oldest in Eastern Ontario. Other pioneer buildings on this site are the blacksmith shop, town hall, Orange Lodge, log barns, drive shed and cheese factory.

This county jail building was constructed in 1833 and remained operational until it was closed in 2002. The facility housed inmates from Cornwall and across the modern-day United Counties of Stormont, Dundas and Glengarry. The jail is home to many historical artifacts and displays; it is considered one of the oldest public structures in Ontario.

This site comprises 10 heritage buildings that were moved here by members of The Lost Villages Historical Society when the St. Lawrence Seaway was developed in 1958. Casualties of progress, the villages and hamlets disappeared under water but are remembered by former residents. The interiors and exteriors have been restored, and the buildings have been assembled in a village-like setting.

This mill along the banks of the Raisin River is a rare surviving example of a mid-19th century gristmill. It is also noteworthy for its early turbine-style technology that used horizontal waterwheels powered by a water course running through the building. The mill has a local history museum and hosts a farmers’ market and local artist exhibit in the summer.

The Nativity Co-Cathedral was the early nucleus of Cornwall's Francophone community and has been a dominant feature of Cornwall's skyline for over a century. The beautiful structure was designed and supervised by the second pastor of the parish, the Father Paul-Antoine DeSaunhac, a native of Toulouse, France. The first mass was celebrated here on Christmas Day 1891.

This former gristmill, built in 1848 and the centre of commerce in Glengarry, currently houses the Priests Mill Arts Centre (PMAC). PMAC provides exhibition space as well as support and promotion for visual, literary and performing arts by regional artists. It is also a centre of glass art excellence that offers glass-learning experiences.

Located on the banks of the St. Lawrence, the Saunders Hydro Dam Visitor Centre showcases the history of the St. Lawrence Seaway and Power Project, as well as the communities and people affected. It also tells great biodiversity stories, like that of the American eel. Come and explore the informative interactive displays that make the site a key tourist destination.

A small, cruciform, arts and crafts-style building complete with belfry and three bells, this church is an architectural gem. It was built on the McLennan Estate in 1898. Located on the South Service Road and surrounded by Glengarry Provincial Park and Lancaster Park, it is commonly known as "The Church in the Wildwood."

In 1970, a fire consumed the church of St. Raphael’s, one of the earliest Roman Catholic churches in English-speaking Canada. Fortunately, the outer walls were spared and today its impressive scale and fine masonry work continue to attract tourists to the site. The ruins were declared a National Historic Site in 1999.

A church has been on this site since 1784, when Loyalists first settled here. The current church dates to 1876, dedicated to Bishop John Strachan. Built in the Gothic style, the building features marble floors, stained-glass windows, a Casavant organ, and plaques and memorials to early Cornwall citizens. Outside, the churchyard features graves dating back to the late 1700s.

Home to over 200 various bird species, this bird sanctuary is perfect for the experienced birder, environmental enthusiast or anyone who enjoys a relaxing and leisurely walk in the great outdoors. With over 8 kilometres (5 miles) of self-guided trails that take you through mature forested areas, wetlands and boardwalks, this is truly the best way to spend an afternoon.

YourTV is continuing the tradition of producing local community television in Cornwall, a medium that has been part of Cornwall life for half a century. Stop by the YourTV studio on Saturday during Doors Open to get a first-hand look at the editing room and studio where the magic of television comes to life!