Wet spongy land can be described by two words: SWAMP and FEN. A SWAMP is an area of low-lying, wet land that is often flooded and contains many different types of vegetation. A FEN is a type of wetland that is fed by groundwater and surface water, and is characterized by its peaty soil and alkaline conditions. Both swamps and fens are important habitats for a variety of wildlife, and they provide valuable resources such as water filtration and flood control.