At the mouth of Manila Bay just off the coast of Philippines lies a huge battleship-shaped immovable concrete structure that was built in the early twentieth century to defend Manila. Known as Fort Drum, but commonly referred to as the “concrete battleship,” this heavily fortified structure roughly resembles a concrete ship. Fort Drum stands on an originally barren rocky island called El Fraile that was leveled by the U.S Army between 1909 and 1914, and built up with thick layers of steel reinforced concrete into a massive fortress, 350 feet long, 144 feet wide, and rising 40 feet above the water.

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