Unable to answer "Is this building completely underground?" for https://osm.org/way/99173192 via StreetComplete 53.0:

Around the building (hotel: Hotel welcome Inn) there are parking lots and under the parking lots there are shops

Attached photo(s):
https://westnordost.de/p/153093.jpg
https://westnordost.de/p/153094.jpg
https://westnordost.de/p/153095.jpg
https://westnordost.de/p/153096.jpg