The 12 worst shipwrecks of all time

Pirate ship Whydah Gally sunk by Atlantic storm

Giant whale rams, sinks whaleship Essex

"Unsinkable" Titanic goes down after hitting iceberg

Union soldiers perish in Sultana shipwreck

Dona Paz ferry disaster an Asian Titanic

Hurricane sinks "Ship of Gold"

Ships carrying war cargo collide in Canadian harbor

German submarine sinks passenger ship Lusitania

Soviet submarine torpedoes ship of refugees

New York picnic outing turns deadly in steamboat fire

Exxon Valdex disaster covers Alaskan coast in oil

Refugees and migrants make dangerous crossings

Staying safe if there is a shipwreck.