 Those looking for trips within the U.S. are flocking to the mountains this year, with Denali National Park in Alaska a popular spot, where temperatures peaked this month at about 66 degrees. Snow-capped mountain peaks and wildlife are also a big draw, and there's a surge in demand for locations like Newfoundland, Canada. Currently, the biggest travel destinations are Norway, Greenland, and Iceland, as trips are up about 37 percent compared to a year ago, according to Kensington Tours.