Introduction to the small post office: The small post office at the end of the world (Unidad Postal Fin del Mundo) is built on the edge of the southernmost Bahia Bay in Tierra del Fuego National Park, the closest to Antarctica. Its special geographical location determines its uniqueness. Countless tourists come here every day. The plank road leading to the Beagle Channel in front of the post office is covered with Argentinian flags of all sizes. Not far away, the national flag fluttering in the wind can also be seen vaguely on the Redonda Island belonging to Argentina.