The United States is an incredibly diverse and vast country. From Alaska's frozen tundra to Hawaii's sunny beaches, it offers a lot of everything. Every traveler will find something they enjoy about its diverse landscapes, climates, people, cultures, and history. At more than 9.8 million square kilometers, it's the world's third-largest country (after Canada and Russia). Among its most iconic landmarks and natural wonders are the Grand Canyon, Niagara Falls, and Mount Rushmore.