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10 of the world's most spectacular artificial reefs

subway cars in Redbird Reef

Photo: StanTheCaddy/flickr

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Redbird Reef

Redbird Reef is a highly successful (in terms of wildlife colonization) artificial reef located off the Delaware coast. Consisting mostly of decommissioned New York City subway cars, it covers 1.3 square miles of ocean floor. Aside from the 714 subway cars, it is also made up of 86 retired tanks and armored personnel carriers, eight tugboats and barges and 3,000 tons of ballasted truck tires.

Marine life in the area boomed by some 400 times in the seven years following the reef's creation, and is a bountiful fishing location.