We step aboard the evening ferry from Southwest Harbor to Little Cranberry Island. The ferry captain, a 25-year-old who has run this route since she was 13, pushes off.

Hosting part of Acadia National Park, Mount Desert Island is 108-square miles of rocky shoreline, mountains, valleys, lakes and forests, about two-thirds of which is national parkland.

How will the president spend his weekend on Mount Desert Island in Maine? We've got some ideas for him (and you) from our summer road-trip guide.