The word archipelago — which in ancient Greece meant the Aegean Islands — conjures up exotic locales in far-flung places. But the U.S. has its own set of chain islands that are waiting to be explored. From the wild woods of eastern Wisconsin to the cranberry-covered isles of Maine to the bioluminescent waters of Puerto Rico, many are still predominantly undeveloped — meaning you’ll find more flora and fauna than fast food and strip malls. It’s a small price to pay for enjoying natural beauty.