Coastal fortifications are military structures built along coastlines to protect against naval attacks and invasions. These fortifications can include batteries, bunkers, and watchtowers, designed to provide strategic defense and surveillance of maritime areas. They often utilize natural landscapes to enhance their effectiveness. Historically, coastal fortifications have played crucial roles in conflicts, safeguarding important ports and cities. Many famous examples include the Morris Island Lighthouse in the United States and the Fortifications of Vauban in France. Today, some of these sites are preserved as historical landmarks, while others continue to serve military purposes.