@Westernkid : The answer to that could be an extended one. A smaller college strong in math will offer ~15-20 courses beyond the level of multivariable calculus/linear algebra, plus the option of Budapest semester, which could, depending on your current level, provide you with ample course selections for breadth, depth and variety. Though I might have recommended them in any event, those particular colleges (Reply #3) appear in a Princeton Review sampling, “Great Schools for Mathematics Majors,” along with MIT, Caltech, UChicago et al.