A peninsula is a landform that extends from a mainland and is surrounded by water on most sides. Peninsulas exist on all continents. The largest peninsula in the world is the Arabian Peninsula.
Floridian Peninsula
Scandinavian Peninsula
Arabian Peninsula
Antarctic Peninsula
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins.
This conical hill in Salar de Arizaro, Salta, Argentina called Cono de Arita constitutes a landform.
Panorama of Great Smoky Mountains National Park showing physical features of a rolling plain, actually part of a broad valley, distant foothills, and a backdrop of the old, much weathered Appalachian mountain range
Karst tower landforms along Lijiang River, Guilin, China