Post Office, Ulva, Stewart Island, the most Southern Post Office in the World, circa 1910
Charles Traill, an Orkney Islander, established a post office on Ulva Island in 1873. Ulva is an island in Paterson Inlet, Stewart Island, New Zealand's third largest island that lies across Foveuax Strait at the bottom of the South Island.
A view from a hill overlooking the Ulva Island post office, circa 1910s. The sender writes "terribly rough trip across [Strait] nearly every one was sick. Thank goodness I wasn't."
One can understand the discomfort of the sea voyage given the size of the tourist schooners plying Foveau Strait at the time. The sea voyage today can still be a rough one -
The Ulva post office closed in 1923 with a post office continuing operations in Half Moon Bay. Neither could still claim to be the southern most post office today since postal services operate now at places like Scott Base (NZ) and McMurdo station (US) in Antarctica.
The old post office building still remains on Ulva, but the island is now an open wildlife sanctuary. The sanctuary is free of introduced pests such as rats, enabling the re-establishment of native bird species including the Tieke/saddleback, mohua /yellowhead, toutouwai/Stewart Island robin and tītipounamu/rifleman since 2000. More details here.