Located about five hours north of Toronto, Ontario, the Peter Grant Mansion is the largest home in Canada. It was never finished and is now a prime destination for urban explorers. From Curiocity:
Named after its intended owner who was the CEO of a well-respected lumber company, this uniquely designed palace could have been a modern marvel – with waterfalls, two indoor pools, a small golf course, a squash court, and an indoor boat garage that could fit his 40ft yacht.
Sadly, following the 2008 financial crisis, it was abandoned mid-construction and now it sits desolate, unfinished, and unsettling.