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

The oldest landmark of Toronto is a testament to shifting sands.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

This urban oasis is a marvelous meld of music and landscape architecture.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

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

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.

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

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

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

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

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

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

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A terrific purveyor of natural history objects and curios.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A bit of retro transportation flair preserved in the world's largest department store.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.