The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

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

Inside this park, an engineering marvel from the early 20th-century still stands.

The world's only bushplane museum captures the spirit of the early planes and pilots and their contributions to northern life in Canada.

Among the cliffs of the Elora Gorge is an oft-overlooked piece of celebratory graffiti.

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

In the back of a bustling factory lurks a quiet museum honoring the history of Canadian sugar manufacturing.

Possibly the world's largest coin stands just outside of a Canadian science center.

The largest canoe collection in the world—and the most Canadian museum ever.

This museum explores the history of stickers and is home to RePEELed, an exhibit featuring sticker art from around the world.

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

The ruins of a rehabilitation center for World War II vets can be found in the Westminster Ponds Conservation area.

This quaint museum taps into the sweet history of the maple syrup industry.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

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

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

A boardwalk winds above this beautiful bog full of wildlife and a rare type of turtle.

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

It's 2 billion years old!

One of the largest underground systems runs under Canada's largest urban center.

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

One of Mother Nature’s geological gems, home to many prehistoric fossils.

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

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