The southernmost city in the world is Puerto Williams, located in Chile. Situated on Navarino Island in the Beagle Channel, Puerto Williams has gained recognition for its stunning landscapes and natural beauty. It serves as a hub for adventurers exploring the surrounding wilderness, including the Cape Horn area. While Ushuaia in Argentina was previously deemed the southernmost city, Puerto Williams has been officially designated as such, offering a unique glimpse into life at the edge of the world.