Creating places to mentally refresh?

When your brain has grown tired learning, remembering, etc., design can encourage a quick mental refresh when:

• You can see through a nearby window to nature outside, particularly if quietly flowing, “friendly” looking water is in view. When more different types of plants are visible, that’s also a plus.  Even a window box right outside your window, whose contents you can see, will help.  So do nearby green roofs.
• The art around you brings nature to mind, featuring nature scenes, whether it’s still or moving (like a video), a photograph or a painting (a little abstraction is OK but you need to think “nature” when you look at a piece for mental refreshment). Best are scenes it seems you might be able to step right into, a la Mary Poppins.  Also great: art featuring nature scenes that might be right outside, that include plants similar to the vegetation, etc., found outside the building that houses them.
• You can see green leafy plants (a few, one or two).
• The space that you’re in is bathed in natural light.
• Wood with visible grain is in view, particularly if it has a warm finish (but not too much, less than half of the surfaces wherever you are should be covered with wood grain, whether it’s “real” or a good fake)..
• There’s water around. The sound of tranquilly moving (but still moving) water refreshes us and so does seeing it—even in a desktop bubbler or a fountain outside (modest size is OK here) in an otherwise completely manmade courtyard, etc.  Have time to keep a few fish alive?  Seeing them swim in an aquarium is great for refreshing your mind—and so is looking into a controlled fire (such as one of space-reasonable size cracking along in a fireplace).
• You can hear the sounds of a lovely Spring day, such as a gently burbling book, even if these sounds are recorded and you’re hearing them indoors