As National Parks Week approaches, a guidebook author joins us to share ideas for exploring America’s 59 national parks. Then tour guides to France help listeners plan their summer voyages, with advice for marking the 75th anniversary of D-Day in Normandy, and enjoying a "babymoon" in Paris. Plus, the author of "Sea People" tells the fascinating story of how Polynesians came to populate the most far-flung islands on earth. 

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