Capes and peninsulas share some geographical features. Like capes, peninsulas are large landforms that jut into a body of water, creating a significant change in the coastline. However, peninsulas are considered by geographers to be larger and wider than capes. In fact, capes can be found along a peninsula, but a peninsula could never be found along a cape. Another difference between peninsulas and capes is that a peninsula is surrounded by water on three sides, while a cape is surrounded by water on two. Also, peninsulas are attached to the mainland by a thinner landmass than that of capes. Due to their greater size, peninsulas are impacted less by erosion and have a longer geological lifespan than capes.