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

This Elizabethan hedge maze is one of only six in North America.

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.

One of the best examples of Modernist religious architecture in Mexico City.

One of Monterrey's oldest buildings is perched atop a hill boasting impressive views of the city.

A honeycomb-like structure of interlocking shelves creates a beehive of books.

This ”skyspace,” which bears a resemblance to a spacecraft, is designed to disappear in the presence of light.

A mountaintop shrine named for the road to heaven.

A Beaux-Arts architectural surprise and a charming nostalgic tour through northern Mexico’s railway revolution.

For decades, the parade of apostles that left the Expiatory Temple of Guadalajara remained hidden inside one of the towers.

This museum dedicated to cartography is housed in a former 17th-century convent.

Tijuana's legendary jai alai or "basque ball" palace is now a massive music venue.

History is on display in this hall, which has served as the seat of city government for centuries.

This Oaxacan town is known for its colorful fantastical creatures hand-carved by local artisans.

Hotel designed around a 16th century Mexican bullring.

A "time traveler's" vision of human history stretches throughout Mexico City's Copilco metro station.

The now-public home of a renowned art collector is full of unique pieces from viceregal and 19th-century Mexico.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

The mummies of a fake priest and bandit's wife are among the abundant curiosities at this museum.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.