If your number one priority for a college education is to study abroad, then you should start your search at these universities. They not only have great study abroad programs, but also high numbers of students that study abroad during their college careers.
Goucher College in Baltimore, Maryland was the first liberal arts college to actually require it's students to study abroad. It claims a 118% study abroad rate since some students participate more than once! The college has more than 60 study abroad programs in 32 different countries including Costa Rica, Uganda, Italy, and Belgium, so you'll be sure to find one that appeals to you.