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10. M/T Haven

Oil Spilled: 1 million barrels
Cost in 2010: $85 million

In April 1991, the M/T Haven suffered a devastating explosion that caused the ship to eventually break in two and sink after three days. The explosion occurred when the ship was unloading fuel into an offshore loading platform near Genoa, Italy, when a routine transfer procedure caused an explosion that caused flames more than 100 meters high and killed six crew members.

Officials estimated that most of the oil burned off, but about 290,000 barrels leaked into the ocean, affecting the Mediterranean coasts of Italy and France for the next decade

Photo: Romani Cagnoni | Hulton Archive | Getty Images