HM Fort Roughs is a former military fortification located on the island of Roughs, off the coast of Essex, England. Built in the late 19th century, it was designed to protect the Thames Estuary from naval attacks. The fort features a distinctive circular design and was equipped with heavy artillery. The fort was decommissioned after World War II and has since been repurposed for various uses. Today, it is primarily known for its unique architecture and historical significance, attracting visitors interested in military history and coastal defenses.