A peninsula is a landform that is surrounded by water on three sides but is connected to the mainland on one side. This unique geographical feature can vary in size, from small rocky outcrops to large expanses of land, and is often characterized by diverse ecosystems and scenic landscapes. Examples of well-known peninsulas include the Iberian Peninsula in Europe and the Florida Peninsula in the United States. Peninsulas can play significant roles in human settlement and economic activities, often serving as prime locations for cities and ports due to their access to maritime resources. They can also be important for biodiversity, providing habitats for various species. The study of peninsulas contributes to our understanding of coastal processes and environmental changes.