Bonsai.
My profile picture Kuromatsu (black pine tree) died soon after I bought it because I didn't know how to take care of it.
I went to a Bonsai museum the other day and learnt about Bonsai.
How to appreciate Bonsai:
Stand in front of a Bonsai.
Squat down and look it up from the lower position.
If you feel or see it as a huge tree then it is a very good Bonsai.
How to decide a ranking:
The shape of the tree.
The age. The older the better.
The history of owners.
The definition of Bonsai:
Describing a scenery in a small pot.
Bonsai is a small cosmos in a pot.
cosmos; space; universe
You can imagine as if you are seeing an actual scenery.
I've learned about Bonsai but I don't know how to take care of it yet, so I think I should take a Bonsai lesson someday.