This summer's top 10 fastest-growing U.S. destinations are: 1) Nashville – America's home of country music jumped 365 percent over last year. 2) New Orleans – Known for its great food and jazz, interest in the Big Easy is up 340 percent for summer getaways this year. 3) Palm Springs – Up 334 percent, Palm Springs has transitioned from a winter getaway to a year-round destination. 4) Portland, Maine – Long a popular New England destination, travel to Portland is up 328 percent. 5) Santa Barbara – Travelers are exploring a wider range of coastal locales on the west coast, and interest in this gem has risen 320 percent. 6) Oregon Coast – Golfers, sand-boarders and dune buggy enthusiasts love the Oregon coast, helping boost its popularity 316 percent this summer. 7) The Adirondacks – Whether it's the region's mountains, forests and wild landscapes, or just finding the right Adirondack chair by the water, New York State's playground was up 316 percent this year. 8) Denver – The mile high city saw bookings rise 306 percent. 9) Coastal Orange County – This area's beautiful beaches and easy living made it increase 306 percent. 10) Boulder – At the base of the Rocky Mountains, Boulder's summer bookings are up 291 percent. Top trending destinations were determined by comparing bookings from Labor Day 2013 through April 2014 for travel from Memorial Day through Labor Day 2014 against bookings at the same destinations between Memorial Day and Labor Day last year.