<p class="ingestion featured-caption">This abandoned mansion is also the largest residence in Canada. It has sat empty and deteriorating for a decade.Freaktography/Shutterstock</p><ul class="summary-list"><li>The Peter Grant mansion, known as Canada's largest home, has been <a target="_blank" class href="https://www.businessinsider.com/abandoned-mansions-for-sale-why-big-expensive-houses-cant-sell-2024-5">abandoned</a> for over a decade.</li><li>Located on Lake Temiskaming in Ontario, the 65,000-square-foot home was never finished.</li></ul><p>Who wouldn't be captivated by the thought of a sprawling mansion with a vast open floor plan, lakeside views, and striking modern architecture?</p><p>It's a homeowner's dream — as long as they don't mind the broken windows and scattered construction materials on the floor.</p><p>Once owned by Grant Forest Products magnate Peter Grant, the Peter Grant mansion in Haileybury, Ontario, Canada, is believed to be the largest house in the country. However, the 65,000-square-foot home has famously been <a target="_blank" class href="https://www.businessinsider.com/look-inside-abandoned-mcneal-mansion-new-jersey-2023-6">abandoned</a> and left to deteriorate over the years.</p><p>Construction on the massive home was halted amid the 2008 financial crisis and the property was never finished. What had been constructed has since fallen into ruins.</p><p>Take a look inside the abandoned Peter Grant mansion.</p>