Lake within a lake.

Secret Swing.

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

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

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

Stunning views over Ontario's old-growth pine forests.

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 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.

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.

Canada's oldest sugar maple has been growing since around 1500.

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

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

Canada's subterranean Cold War museum has doubled as a movie set.

Little island known for its massive beachfront "flowerpot" pillars.

Soaring over the Niagara Whirlpool since 1916.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

305 homemade stone stairs wind their way up the Hamilton escarpment.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

These strikingly barren, rolling red hills were caused by bad farming practices.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This natural sea cave hides a small wonderland of natural turquoise beauty.