Unable to answer "What kind of artwork is this?" – Artwork – way/877635892 via StreetComplete 63.0:

Not sure, some pillars with steel in top. Looks like a mono rail.

Attached photo(s):
https://streetcomplete.app/p/338637.jpg

Unable to answer "Do these steps have a handrail?" – Steps – way/1423370568 via StreetComplete 63.1:

Not sure what to answer to the question if there is a hand rail. There is a metal railing that can also be used as hand rail but no dedicated hand rail.

Attached photo(s):
https://streetcomplete.app/p/342330.jpg

Unable to answer "Who is allowed to use this playground?" – Playground – way/138128889 via StreetComplete 63.1:

Currently no playground here. It might only be there during main summer season.During season playgrounds and volleyball nets on the other side can be used free of charge.

Attached photo(s):
https://streetcomplete.app/p/342329.jpg

Unable to answer "Do you need to pay to use this?" – Mounted Binoculars – node/10951555631 via StreetComplete 63.1:

Currently no binoculars, possibly only there in summer season.

Attached photo(s):
https://streetcomplete.app/p/342325.jpg

Unable to answer "What are the opening hours here?" – promobo (Gift Shop) – node/5715768010 via StreetComplete 63.0:

temporarily closed due to train station renovation.