access=* is missing; presumably all of these parking spaces are private and mapping them without access=private might be misleading to users seeking parking. Perhaps individual private parking spaces belonging to a house should not be tagged at all.

Gibt es hier eine Bushaltestelle "Wanderparkplatz Weißenbach"?

"Stationenweg" hat das Attribut access=no; damit wird er auch vom Routing für Fussgänger ausgenommen.
Ist der Weg (der auch Teil mehrerer Wanderwege ist) tatsächlich für Fussgänger nicht passierbar?

Is there a "Forge Road"?

Is ther a Remote Radar Head (RRH) of the British Armed Forces?

Is there a helipad?

Ponds missing here.

What is the name of the ruins here? When were they used?

This cannot be "Jack's Mountain".