The Puget Sound is full of islands and the easiest one to reach from Seattle is Bainbridge Island. There are two ferries constantly plying the waters between the island and Pier 52 in Seattle each day. The ferries are cheap and are provided by the Washington State Department of Transportation (WSDOT). Bainbridge Island is best explored as a day trip with a rental vehicle, but one of the best reasons to take the ferry is the scenic view of the Seattle skyline from the boat. Cars are loaded onto the bottom of the ferry and exited during the ride across the sound. The large vessels have a cafeteria style restaurant on board offering chili and chowder bowls and if you're not driving, a decent selection of beers. The island itself is primarily forests and vineyards and too large to explore on foot, but the town at the Bainbridge harbor is quaint with some nice restaurants and shopping. Be sure to check wait times for the ferry during the week as it functions as a primary mode of transportation for islanders that commute to Seattle and beyond for work each day.