A large spinning bath of liquid mercury, used to probe the early universe.

Mysterious concrete spires left on a small Canadian hill.

An operating lighthouse from the 1860s.

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

A neutrino detector built into the largest man-made underground cavity in the world.

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

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

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

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

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

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

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

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

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

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

Traditional 15th century Chinese garden in the middle of Vancouver.

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

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

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

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