Spoiler: this describes a place reached late in the game.
Chapel of the Still
structure
A roofless chapel of the Order of the Still Hour. At its end stands a Still Pane: a frame with a sheet of stopped water. Around the pane the grass is already bent and the dust hangs; the Still come through such windows.
The structure holds 1 chest with loot; the chance is to find the item at least once per chest.