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

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.

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

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.

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

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

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

This whimsical fountain pays tribute to Toronto's four-legged friends.

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

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

Soaring over the Niagara Whirlpool since 1916.

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

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

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

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A dark tunnel leads to a striking white crater that seems to be from another planet.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

A flooded Mexican cave that hides a river beneath the water.