The Deepwater Horizon drilling rig holds the world record for the deepest oil well ever drilled, at 35,055 feet (about six miles) in the Tiber Oil field. It also has the distinction of causing the largest oil spill in United States history.
On April 22, 2010, the well had a wellhead blowout, shooting natural gas up the drill pipe to the surface, causing an explosion that killed 11 men. The shear ram designed to seal the well failed, and could not be fired manually days after the explosion.
An estimated 206 million gallons of oil were spilled into the Gulf of Mexico for 87 days until it was capped on July 15, 2010.
Photo: U.S. Coast Guard/Getty Images