This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

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

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

A lake formed in the basin of a massive impact crater takes the shape of an unbroken ring when viewed from above.

This artful dam holds back a crater-made reservoir that can be seen from space.

An abandoned town centered around a paper mill powered by a large waterfall.

The biggest museum dedicated to insects in North America, one of the largest in the world.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

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

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

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

Louise Bourgeois' 30-foot-tall steel spider sculpture.

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

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Historic medieval fortified city in southwest France.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

The oldest working mechanical clock in the world.

The oldest inn in England served brew to the crusaders.