For many places around the States, spring is hardly a season anymore. In a matter of weeks, the dull, overcast and frigid days of winter give way to sweltering summer skies, leaving kids and adults from coast to coast scrambling for a way to cool off. Suddenly local swimming holes are packed, flights to seaside destinations are overbooked and air conditioning becomes one of the world's greatest inventions. Because summer seems to come earlier each year, everyone should have a game plan for beating the heat. Here's a list of America's hottest places to cool off, including family-friendly waterparks, exotic scuba and snorkeling destinations and bucolic beaches.