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

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

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

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

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

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

This 1967 experiment in modular architecture was designed to be a new model for urban living.

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

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

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

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.

This abandoned office building is a lasting example of Soviet-era architecture.