The metal truss bridge served as the sole entry point to an "isolation island" for smallpox outbreaks throughout the 1870s and early 1940s.

These prehistoric replicas were based on actual skeletal remains.

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

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

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

All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

A historical home in upstate New York honors the work of John W. Jones, a formerly enslaved man who was a major agent for the Underground Railroad.

The little-known final resting place of one of America's greatest writers.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The artwork commemorates the many ways 20th-century people perished while on the clock.

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

Lost subway station nestled beneath Toronto's busy commuter line.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Secret Swing.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

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

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

A unique collection of Science Fiction, Fantasy, and everything in-between.

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

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.

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

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