25. Yonge-Dundas Square, Toronto: 1 million (est.)

For attractions that also serve as public spaces, tourism statistics are nearly impossible to compile. To avoid confusion, we decided to not count shopping malls, for example, including Toronto's Eaton Centre, the country's busiest shopping center. Yonge-Dundas Square, Toronto's "Heart of the City," presents a similar problem. While the surrounding area sees an estimated 52 million annual visitors, the vast majority are workers and local shoppers. One reliable statistic claims one million event-specific visitors in 2007, which alone makes the Square one of Canada's top 25 attractions. With the upcoming opening of the Toronto Life building and the Citytv studios, we can reasonably assume the number will be much higher for 2008.