Located between Mexico and Canada, the United States of America is known around the globe for its political and military power. The country is the "Land of the Free" and is known for its democratic government and strong economy. Today, the United States is one of the most ethnically diverse countries in the globe, due largely to the influence of immigration throughout its history. It is also diverse in its geography, encompassing everything from the frozen lands of northern Alaska to the tropical islands of Hawaii. This diversity has given the country abundant natural resources, which have fueled its strong economy.