All Islands and Archipelagos

Named islands, islets, atolls, cays and archipelagos treated as whole landmasses, following the standard geographic island classification. Includes single named islands and islets, and groups of islands described as an archipelago or island chain (Aran Islands, Argentine Islands). Belongs here: any entity whose own defining identity is a landmass surrounded by water, whether a single island or a named group. Does not belong here: a single sea stack or reef feature not treated as an island in its own right (Coastal and Reef Features), or a karst or volcanic landscape whose defining identity is its geological process rather than its status as an island (Karst Caves and Sinkholes, Volcanic Formations). This subcategory holds entries the oversized-subcategories report (ruling 926) flagged as likely mis-filed under Geological Formations rather than a geography category; a later review lane may relocate them, but each now has a real, correctly named home rather than sitting inside a catch-all erosional bucket.