Fort Griswold is a historic military fort located in Groton, Connecticut. Built between 1776 and 1781, it was designed to protect the area during the American Revolutionary War. The fort played a significant role in the defense against British forces, particularly during the Battle of Groton Heights in 1781. Today, Fort Griswold is preserved as a state park and is open to the public. Visitors can explore the fort's earthworks, view historical markers, and learn about its history. The site also features a monument dedicated to the soldiers who fought in the battle, honoring their contributions to American independence.