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

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

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

This urban oasis is a marvelous meld of music and landscape architecture.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

The giant birds honor two native North American species.

This half-ton piece of the Alps sits at the base of the CN Tower.

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.

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

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

The remains of the oldest bone-headed dinosaur in North America.

The "birthplace of insulin," where Sir Frederick Banting realized the hormone could save the lives of Type 1 diabetics.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

These gardens recreate unique and endangered Michigan habitats.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

Home to a protest movement, a bombing, and a dramatic change in labor history.

A unique botanical garden housed in three giant geodesic domes.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

A hollow cement depiction of time's inexorable effect on the human body.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.