January 2024 update
New subject type: Landscape
The Landscape subject type is now available in the image data form (when you upload an image or when you modify it via the Edit menu).
As this is new, all past images that are a landscape are not tagged correctly (probably Extremely wide field or Other) and therefore the search for landscape images appears pretty empty now.
Please go to your landscape images, click on the Edit menu, choose Content, and change the Subject type to Landscape.
Thank you!