Puerto Williams, a main settlement, port and naval based on Navarino Island in Chile, has been upgraded to the category of “city” by Chilean authorities, making it the world’s southernmost city. /VCG Photo

Puerto Williams has nudged out Ushuaia, a neighbor in Argentina’s Tierra del Fuego, for the title. /VCG Photo

“For us, it’s a tool that will do much to help us to attract more tourists,” said Francisca Albornoz, president of the Tourist Association of Cabo de Hornos. /VCG Photo

But some residents worry that the new title could draw more people and threaten the very qualities that make it so attractive to begin with. /VCG Photo