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

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

These locks on North America’s oldest canal are named after a porcine rock formation.

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

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

Home of the world's largest crocodile.

The modern birthplace of Irish freedom.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

An ancient neolithic tomb that only sees the sun twice a year.

The ancient tomb acts as a calendar that keeps perfect time.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

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

Two thirds of this Montreal neon icon has survived to flash another day.

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

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

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