As of mid 2020: The sinkhole is still there, with a metal fence added around it. Parking not accessible to vehicles.

Αγίων πάντων 82α

via StreetComplete 61.2

stop sign

parking:
access=no (at least for all vehicles. Pedestrians still use the ways for navigation, although this may not be permitted)
Part of the parking has collapsed since spring 2018 (reason: something about the underground river)
We may also add a natural=sinkhole node at this location

Σκλαβενίτης

Εδώ πρέπει να υπάρχει κατάστημα με τσάντες και το καφενείο να είναι Αριστερά

Αγίων πάντων 88

via StreetComplete 61.2

stop sign

Unable to answer "Do the trees here have needles or leaves?" for osm.org/way/400030424 via StreetComplete 53.0:

Φοίνικες

name=Δημοτικό Parking «Πασά»
operator=Δήμος Μοσχάτου-Ταύρου
type=surface
surface=asphalt
capacity=40
access=private