The Peñón de Vélez de la Gomera is a small, rocky islet located in the Alboran Sea, about 120 kilometers southeast of Ceuta and 125 kilometers west of Melilla. It is one of several Spanish exclaves on the Moroccan coast.
The Peñón de Vélez de la Gomera was a natural island in the Alboran Sea until 1930 when a huge thunderstorm washed large quantities of sand into the short channel between the island and the African continent. The channel was turned into a tombolo and the island became a peninsula, connected to the Moroccan coast by a long sandy isthmus.
The border segment in Peñón de Vélez de la Gomera is the shortest single land border in the world. It is only 85 meters long and separates the Spanish possession of Peñón de Vélez de la Gomera from Morocco. The border runs along a narrow isthmus that connects the two peninsulas of the Peñón.
The border is secured by a series of fences, watchtowers, and sensors. It is marked by a blue rope that stretches across the isthmus. On the Spanish side of the border is a small military base, while on the Moroccan side is a beach.