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

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

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

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

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

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

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.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

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

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.

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

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