Corregidor Island is a must see for anyone visiting Manila with at least a passing interest in WW2 history. Just a short ferry ride from The Philippines capital, Corregidor Island is essentially an outdoor museum to one of the most famous battlegrounds in the Pacific, a strategically important island because of its position at the mouth of Manila Bay, it was brutally fought over by the American and Filipino forces against the Japanese invaders from 1942 to 1945.