The Old Mystic Fire District covers the Old Mystic part of Groton, and offers mutual aid to other fire departments that may need help. The department is a combination of about five career firefighters and 25 to 30 volunteers. The department has three engines as well as a tower ladder truck and a truck with heavy rescue equipment. Ken Richards Jr. is chief of the district.
One of the historic local sites that have made Mystic famous, The Denison Homestead is an 18th century farmhouse perched on 200 acres of unspoiled woodlands and meadows. It has been continuously owned by the Denison family, and is now open for tours during part of the year. The furnishings inside the house are original family heirlooms, and each room reflects a different period in the site's rich history.