Details: This poster shows a photo of an iceberg from both above and below the water. There is a small portion floating above the surface, while most of the iceberg is below the surface. At the bottom it says 'Hidden Depths'.
An iceberg is a large piece of freshwater ice that has broken off from a snow-formed glacier or ice shelf and is floating in open water. Typically, only one ninth of the volume of an iceberg is above water. The shape of the remainder under the water can be difficult to surmise from looking at what is visible above the surface. The word iceberg comes from Dutch ijsberg, literally meaning mountain of ice.