"there was no postbox here"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-12-14T02:16:23Z
POI has no name
POI types: amenity-post_box
#organicmaps ios 2025.12.22-1-ios

rotonda

rotonda

rotonda

Glorieta partida