Unable to answer "Is this place wheelchair accessible?" – Kurbelwelle (Tourist Attraction) – https://osm.org/node/8493678202 via StreetComplete_ee 59.2:

In regards to wheelchair accessibility: Tourist attraction is not intended to be standed on but rather viewed, surrounding road is however wheelchair accessible. The node has no need for wheelchair accessibility, the surrounding area has it however

Attached photo(s):
https://westnordost.de/p/250548.jpg