Unable to answer "Is this still here?" – Alur (Hostel) – https://osm.org/node/745640264 via StreetComplete 58.1:

At Bell is written: kocom

Attached photo(s):
https://westnordost.de/p/223178.jpg
https://westnordost.de/p/223179.jpg

What is happens here? I see beach, but the restaurant is on the map in the water?

Unable to answer "What are the opening hours here?" for https://osm.org/way/573637932 via StreetComplete 53.2:

Hotel Pelikan + Restaurant

Unable to answer "Is drinking water freely available to campers here?" for https://osm.org/node/8837790181 via StreetComplete 53.2:

the tap water smells and tastes a lot like chlorine

Unable to answer "What is the house number of this building?" for https://www.openstreetmap.org/way/331047901 via StreetComplete 4.0:

es ist das ehemalige Pissoir S-Bahnhof Babelsberg. Es steht keine Hausnummer dran.