Corregidor is an island in the entrance of Manila Bay and due to its position it has served as a strategic naval defense for the capital city of Manila. During World War 2, Corregidor was the site of several battles and its fall to the Japanese forces was instrumental in the subsequent capture of the Philippines and the retreat of the US forces in the early phase of World War 2 (Wikipedia).
During the Spanish colonial era, Corregidor served not only as a fortress of defense and a penal institution, but also as a signal outpost to warn Manila of the approach of hostile ships. It was also used as a station for customs inspection. Corregidor comes from the Spanish word corregir, meaning “to correct.”
Today, Corregidor is known as a historic and tourist site and is managed under the jurisdiction of Cavite City. Geologically, Corregidor Island is a volcanic remnant of the Corregidor Caldera, which was active about a million years ago. Philippine Institute of Volcanology and Seismology has listed the island as a potentially active volcano.
Tourists can visit the ruins of army headquarters, cannon placements, military tunnels and other defenses used during World War 2. The island is accessible via a ferryboat ride from Manila as a day-trip excursion.
Mabuhay ang Corregidor!