This past spring, I had the opportunity to sail the Mediterranean Sea aboard Silversea Cruise’s flagship, the Silver Spirit, and what better way to explore than with a lifelong girlfriend by my side?

Or not so empty. In his book, “The Swamp: The Everglades, Florida and the Politics of Paradise,” Michael Grunwald described it this way: “The Everglades was the only place on earth where alligators ...