Indescribable

Have you ever felt something that..
You can't describe it after you done something,
After you finish a trip or 
Finish watching a movie,
Finish reading a book you like,
An end of experiences or things you do.

It's neither you feel sad or happy. 
The words doesn't fit sad or happy.
I've been wondering the words to use
To describe that feeling
More than fulfilled

It means.... it ends.
You can't describe it
It feels a memory that maybe i will forget or i still remember
End with its distorted memory
It's ineffable