The Korean Baseball Organization, or KBO, is one of the top professional leagues in the world, and should be on anyone's list to visit. The KBO might be small, but what it lacks in size it more than makes up for in enthusiasm. The league is home to some of the most passionate fans in the world. Here they cheer, sing, and dance along with regular team cheerleaders during each game. They even invented the balloon noisemakers called "thundersticks" to help root on their team. Along with the great fans, the league is home to some of the best bang for your buck in baseball. Tickets are cheap, and concessions are even cheaper. Plus you can bring anything you want to eat or drink into the park which makes for an even better experience for the fans. The stadiums might not be MLB caliber, but the atmosphere more than makes up for it.