World's first "penitentiary," meant to be humane, drove men insane.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

These locks on North America’s oldest canal are named after a porcine rock formation.

This mill on Lake Erie appears to shrink as a viewer approaches thanks to an optical illusion.

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

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

This massive, ancient stone was disassembled and then put back together again.

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

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

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

Soaring over the Niagara Whirlpool since 1916.

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

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

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

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

This Dutch statue is a monument to the fictional shrew who brought doom to the city of Stavoren.

The 20-mile causeway that separates the Netherlands from the sea.