It is sand

via StreetComplete 61.3

"Chiuso"
The place has gone or never existed. A CoMaps user reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-09-06T09:48:08Z
POI has no name
POI types: wheelchair-limited amenity-atm amenity-bank
#CoMaps android

"floor -1"
OSM snapshot date: 2025-08-22T03:20:49Z
POI has no name
POI types: amenity-toilets
#CoMaps android