toilet in building, free, open when building is open, on 2nd etage.

the toilets here are not present anymore (2023/06/25), they might be seasonal or just temporary.

gate, can be opened, not private

gate, can be opened, not private

gate, private property after gate

Flyvraket 2 juli 1942, Dornier DOM17MI-fly

waterfall

there is no sinkhole here. Just a little bit over all lower ground because of water erosion. Nothing special for this area

bike parking, racks

Unable to answer "What kind of crossing is this?" for https://osm.org/node/34730698 via StreetComplete 51.0:

Extra crossing that should not be here, is duplicate.