Spectacle Island is a small island located in Boston Harbor, Massachusetts. It is part of the Boston Harbor Islands National and State Park and covers approximately 105 acres. The island is known for its scenic views, walking trails, and recreational opportunities, making it a popular destination for visitors. Historically, Spectacle Island was used for various purposes, including a landfill and a quarantine station. Today, it features a visitor center, picnic areas, and a beach. The island is accessible by ferry, allowing people to enjoy its natural beauty and learn about its history.