The Rocky Mountains stretch 3,000 miles from Alaska to New Mexico, are the largest mountain range in the US, and are a relatively young mountain range at only 80 million years old. Activities include skiing, snowboarding, and hiking. The Grand Canyon in Arizona was carved by the Colorado River over 2 billion years and stretches 277 miles. Niagara Falls dumps 64,750 cubic feet of water per second and can be experienced via boat. The Northern Lights in Manitoba produce a beautiful light show in the sky.