The Pillbox Bunker is a type of fortified emplacement built during World War II in the United Kingdom. These bunkers were designed to house machine guns or anti-tank guns and were typically constructed in strategic locations such as hills, ridges, or other high points to provide defensive firepower. The bunkers were built to be highly resistant to bombardment and were often camouflaged to blend in with their surroundings. They typically featured a rectangular or square shape with a flat roof, and were equipped with embrasures, or openings, through which the guns could be fired. Many Pillbox Bunkers still exist today, often abandoned and overgrown with vegetation, serving as a reminder of the UK's military history.