The Canadian Tourism Commission has set up big (8′ x 10′) interactive Twitter walls outdoors in Los Angeles, Chicago and New York City in the hopes that Americans will see just how fun Canada is by the way people tweet about it. Whether your in one of these cities or not, if you’re an American (of the south of the Canadian border and north of the Mexican border kind), you can enter a contest for a free trip up north by following @keep_exploring, and replying to the account with your dream Canadian vacation. Here’s the promo video put together by the Canadian Tourism Commission: