It's 2 billion years old!

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

Louise Bourgeois' 30-foot-tall steel spider sculpture.

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

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

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

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

A unique collection of Science Fiction, Fantasy, and everything in-between.

This Toronto garden collects stares and tchotchkes in equal measure.

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

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

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

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

A 1975 bylaw prohibits the construction of any building that would block the view of this Gothic Revival church.

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

The racehorse's headstone highlights a forgotten part of the Hendrie Park Gardens' history.