A view of Topside – the highest area of Corregidor – taken from the vicinity of the Spanish Lighthouse. Shown are the remains of the "Mile-Long Barracks" barely visible above the trees. These main barracks on the Topside section housed the troops of the coast artillery battalions who manned the island defenses. The building was a three-story concrete structure designed to be hurricane proof while providing comfortable, airy accommodations in a tropical environment. Despite the fact it never was a mile long when built, the structure was considered the longest barracks in the world. In the background, across the North Channel, are the mountains of Bataan Peninsula overlooking Corregidor.