Sunken ships are vessels that have gone underwater, often due to accidents, storms, or warfare. These ships can be found in oceans, rivers, and lakes, and they may become artificial reefs, providing habitats for marine life. Some famous examples include the Titanic and the USS Arizona. Exploring sunken ships is a popular activity for divers and archaeologists. They study these wrecks to learn about history, trade routes, and maritime technology. Many sunken ships also contain valuable artifacts, which can provide insights into the lives of those who sailed them.