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

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

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

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

Willy Wonka would love this weird half-a-home.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

This Toronto garden collects stares and tchotchkes in equal measure.

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.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

A French museum of wrought iron.

An ancient ossuary in Rouen.

His "Lionheart" is entombed separately from the rest of his body.