Tilbury Fort is a historic fortification located on the banks of the River Thames in Essex, England. Built in the late 17th century, it was designed to protect London from potential naval attacks, particularly during the time of the Spanish Armada. The fort features a star-shaped layout and is surrounded by a moat, making it a significant example of military architecture. Today, Tilbury Fort is managed by English Heritage and serves as a popular tourist attraction. Visitors can explore its well-preserved structures, including the barracks and gun emplacements, while learning about its role in British history and defense strategies over the centuries.