Canada is a vast country located in North America, extending from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean. It is the world's second-largest country by total area and possesses the longest international land border with the United States. The nation is characterized by immense geographical diversity, encompassing everything from temperate rainforests and vast boreal forests to mountainous regions and Arctic tundra. With a population of approximately 38 million people, Canada exhibits highly varied population densities, with most inhabitants concentrated in major urban centers like Toronto, Montreal, and Vancouver.