The great power and strength of the ocean has caused damage throughout history. Entire cities have been battered by ocean storms, and thousands of ships have perished at sea while traversing the world. While these ships, structures, and other cultural items are not frequently visible from the water's surface, they have survived at the bottom of lakes, seas, and oceans. Marine archaeologists study these sights to gain insight into past civilizations. Part of the "Adventures of a Maritime Archaeologist" series.