Identify a unknown element

Hi Community,

What is this Element exactly? I thought it is the cropbox of the view while it is different from Level1.CropBox or Level1.get_BoundingBox(level1). How could I get all of the unknown elements from a database level, like using collector and typeof(its class)? any help is appreciated!:grin:

View.CropBox: Cuboid

Boundingbox from the unknown element:Top surface of the View.CropBox