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Follow the rainbow to your retirement.
Another list and another mention for Beaufort.
Here's just some of what the site says about Beaufort:
The town is still far enough off the beaten path that you have to really look for it. In fact, many people find Beaufort by boat because most of the town boarders an estuary leading to the Port Royal Sound. Of course, newcomers will quickly realize that there's more to the town than just a pretty face. At the University of South Carolina, Beaufort, older learners are privy to dozens of one-day and multi-session classes in history, literature, religion, music and more.