A military bunker located near Kaap-Bol on the island of Vlieland, Netherlands. This structure was part of the Royal Navy's fire-control installations during the 1950s, serving as a strategic observation and command post. The bunker is situated in the Wadden Sea region, an area known for its extensive coastal defenses and military heritage from both World War II and the Cold War era.
The surrounding dunes and coastal landscape have been shaped by both natural erosion and the presence of numerous military installations from the 20th century.