The ornate miniature mansions were built for Istanbul's feathered residents.

This famous city eluded concrete detection until the early 2000's.

A marvel of Byzantine engineering under the streets of Istanbul.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Known as "Toronto's Flatiron."

The remains of a once-famous hotel that also acted as an artist colony.

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

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

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

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

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.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

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

A historic Montreal market that was the city's agricultural hub for over century.

Every year, the colorful murals of Montreal get a complete makeover.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Take a hike to this remote, scenic tea stop in the Canadian Rockies.

This natural wonder is disappearing at an alarming rate.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Few other hotels can rival the grandeur of the Castle in the Rockies.