When you come to Ushuaia, the southernmost city on the planet, you must come to this small post office at the end of the world. A small wooden house door, a small red post box, this is the southernmost post office in the world. There are only two staff members here, they will pick postcards for everyone, patiently explain and introduce every item here. It is really memorable to send a postcard to yourself or friends and family from here.