Caballo is an island in the entrance to the Philippines' Manila Bay. Caballo, along with the larger Corregidor (2 km to the north), separates the harbor entrance into a northern and southern channel. It is doubtful that Caballo measures even 5 km² in area.
... and a more open terrain of hills and (low) mountains to the south, home to most of Brazil's population and its agricultural base. Along the coast of the Atlantic Ocean ...