U.S., Nov. 21 -- There are many reasons to travel and retracing the footsteps of your ancestors is becoming a more popular reason.

Many of the largest ancestry groups in the US, Canada and Australia are from European countries. Some of these nations will come as no surprise: Ireland, Italy, Greece and the UK can all lay claim to large communities in these "new world" countries.

European migration changed the world and now many people want to see where they came from.

Ireland

Today, cities including New York, Boston, Chicago, and San Francisco are home to significant Irish-American communities. In fact, up to 10 percent of US citizens consider themselves to be of Irish ancestry.

Italy

The Italian diaspora is one of the world's most w...