Carnival Triumph: What was supposed to be a four-day jaunt to the Caribbean became an eight-day nightmare when an engine fire left the ship floating in the Gulf of Mexico without power, air-conditioning, or a working septic system.Carnival Splendor: Carnival’s Splendor suffered a similar fate as Carnival’s Triumph in November 2011. Both were stranded by engine fires, though the Splendor was left floating in the Pacific Ocean. After three days the Splendor and its 4,500 passengers were towed back to the San Diego Bay. Costa Concordia: This Italian cruise ship ran aground on a reef off the coast of Tuscany, Italy, in January 2012 and toppled onto its side. Of the 4,200 aboard, 32 died and 64 were injured, according to the Associated Press. The half-submerged ship is still being removed. -