Port Lockroy is a bay forming a natural harbour on the north-western shore of Wiencke Island in the Palmer Archipelago to the west of the Antarctic Peninsula.
The Antarctic base with the same name, situated on Goudier Island in this bay, includes the most southerly operational post office in the world.
The base was left unstaffed from 2020 to 2022 due to the COVID-19 pandemic, though the museum house remained open to individual visits.
A staff of four typically process 70,000 pieces of mail sent by 18,000 visitors that arrive during the five month Antarctic cruise season.
[10] The historic importance of the site relates to both its establishment as an Operation Tabarin base in 1944, and for the scientific work performed there, including the first measurements of the ionosphere, and the first recording of an atmospheric whistler (electronic waves), from Antarctica.