Georges Island Winter Fortress in Boston Harbor, MA; Shutterstock ID 131506997; Your name (First / Last): Trisha Ping; GL account no.: 65050; Netsuite department name: Online Editorial; Full Product or Project name including edition: Trisha Ping/65050/Online Editorial/New England

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Georges Island is one of the transportation hubs for the Boston Harbor Islands. It is also the site of Fort Warren, a 19th-century fort and Civil War prison. While National Park Service (NPS) rangers give guided tours of the fort and there is a small museum, it is largely abandoned, with many dark tunnels, creepy corners and magnificent lookouts to discover. Weekends on Georges are packed with kids programs, Civil War–era baseball games and jazz concerts.

This is one of the only islands with facilities such as a snack bar and restrooms.