This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

This historic Canadian jail was once the longest operating prison in the country and is now open for people to incarcerate themselves.

The remains of the worst military aviation accident in Canada's history.

The largest open-pit gold mine in Canada.

A sacred Ojibwe site covered in pictographs next to Lake Superior.

A neutrino detector built into the largest man-made underground cavity in the world.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

A school teacher's massive and terrifying self-built castle.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

An abandoned skate park located in the middle of the wilderness.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

A Canadian POW for German soldiers during WWII where prisoners hatched an elaborate escape plan.

A castle built for love, and abandoned due to heartbreak.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

This water-locked cliff face is covered in hundreds of ancient pictographs.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

Thanks to its curved shape, this incredibly durable dam "whispers" to visitors.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

These prehistoric replicas were based on actual skeletal remains.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

A tunnel of hardened lava along Maui’s famous Road to Hana.

What remains of the summer palace of King Kamehameha III.