2. Iceland
Nature and culture combine to make Iceland a truly happy place, so delightful that the tiny country jumped from ninth to second place this year. Explore South Iceland, where many of the ancient tales -- called sagas -- that document Iceland's 10th- and 11th-century history are remembered. A two-hour drive from the capital city of Reykjavik, south Iceland is home to Vatnajokull Glacier, the 60-meter (197-foot) Skogafoss Waterfall and amazing fresh seafood. (Though you could probably skip the fermented shark ...)
No matter where you visit, there's probably a geothermal swimming pool or hot spring spa to soak your weary bones after a long day of exploring. And when you get back to the capital, note that the renowned annual Reykjavik Art Festival will take place from May 17 through June 7.